{ "reviewed": "2026-11-14", "sources": [ { "id": "eia-delivery", "title": "How electricity is delivered to consumers", "institution": "U.S. Energy Information Administration", "url": "https://www.eia.gov/energyexplained/electricity/delivery-to-consumers.php", "date": "Not stated", "accessed": "2026-11-13", "license": "EIA states its government information products are public domain in the United States; third-party material and marks are excluded. No worldwide asset license is assumed.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "U.S. Energy Information Administration, How electricity is delivered to consumers (Not stated).", "modifications": "None to source material. Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "eia-glossary", "title": "Electricity glossary", "institution": "U.S. Energy Information Administration", "url": "https://www.eia.gov/tools/glossary/index.php?id=Electric", "date": "Not stated", "accessed": "2026-11-13", "license": "EIA states its government information products are public domain in the United States; third-party material and marks are excluded. No worldwide asset license is assumed.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "U.S. Energy Information Administration, Electricity glossary (Not stated).", "modifications": "None to source material. Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "doe-101", "title": "Electricity 101", "institution": "U.S. Department of Energy", "url": "https://www.energy.gov/oe/electricity-101", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source text or assets reused; no license for third-party material or marks assumed.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "U.S. Department of Energy, Electricity 101 (Not stated).", "modifications": "None to source material. 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Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "eia-measuring", "title": "Measuring electricity", "institution": "U.S. Energy Information Administration", "url": "https://www.eia.gov/energyexplained/electricity/measuring-electricity.php", "date": "Not stated", "accessed": "2026-11-13", "license": "EIA states its government information products are public domain in the United States; third-party material and marks are excluded. No worldwide asset license is assumed.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "U.S. Energy Information Administration, Measuring electricity (Not stated).", "modifications": "None to source material. Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "eia-circuits", "title": "Batteries, circuits, and transformers", "institution": "U.S. Energy Information Administration", "url": "https://www.eia.gov/energyexplained/electricity/batteries-circuits-and-transformers.php", "date": "Not stated", "accessed": "2026-11-13", "license": "EIA states its government information products are public domain in the United States; third-party material and marks are excluded. No worldwide asset license is assumed.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "U.S. Energy Information Administration, Batteries, circuits, and transformers (Not stated).", "modifications": "None to source material. 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Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "eia-solar", "title": "Photovoltaics and electricity", "institution": "U.S. Energy Information Administration", "url": "https://www.eia.gov/energyexplained/solar/photovoltaics-and-electricity.php", "date": "Not stated", "accessed": "2026-11-13", "license": "EIA states its government information products are public domain in the United States; third-party material and marks are excluded. No worldwide asset license is assumed.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "U.S. Energy Information Administration, Photovoltaics and electricity (Not stated).", "modifications": "None to source material. Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "epa-delivery", "title": "Electricity Delivery and its Environmental Impacts", "institution": "U.S. Environmental Protection Agency", "url": "https://www.epa.gov/energy/electricity-delivery-and-its-environmental-impacts", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source text or assets reused; no license for third-party material or marks assumed.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "U.S. Environmental Protection Agency, Electricity Delivery and its Environmental Impacts (Not stated).", "modifications": "None to source material. Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "aemo-fcas", "title": "Guide to Frequency Control Ancillary Services", "institution": "Australian Energy Market Operator", "url": "https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/ancillary_services/guide-to-frequency-control-ancillary-services.pdf?rev=48b25122c2384d67b69046cbdb56bacb", "date": "2025-09-17", "accessed": "2026-11-13", "license": "Copyright AEMO. Used only as a cited factual reference; no text, tables, or diagrams reproduced.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "Australian Energy Market Operator, Guide to Frequency Control Ancillary Services (2025-09-17).", "modifications": "None to source material. Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "eia-rights", "title": "Copyrights and Reuse", "institution": "U.S. Energy Information Administration", "url": "https://www.eia.gov/about/copyrights_reuse.php", "date": "Not stated", "accessed": "2026-11-13", "license": "EIA states its government information products are public domain in the United States; third-party material and marks are excluded. No worldwide asset license is assumed.", "usage": "Factual reference for independently written explanations; no source prose, photographs, logos, or diagrams reproduced.", "attribution": "U.S. Energy Information Administration, Copyrights and Reuse (Not stated).", "modifications": "None to source material. Explanations and schematic drawings are original.", "family": "electricity" }, { "id": "doe-inverters", "title": "Solar Integration: Inverters and Grid Services Basics", "institution": "U.S. Department of Energy", "url": "https://www.energy.gov/cmei/systems/solar-integration-inverters-and-grid-services-basics", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source prose, photographs, or diagrams reused; third-party assets and marks are not assumed reusable.", "usage": "Factual support for original explanations of inverters, backup operation, and distributed generation.", "attribution": "U.S. Department of Energy, Solar Integration: Inverters and Grid Services Basics (date not stated).", "modifications": "None to source material. All prose and drawings are original.", "family": "electricity" }, { "id": "doe-distributed", "title": "Solar Integration: Distributed Energy Resources and Microgrids Basics", "institution": "U.S. Department of Energy", "url": "https://www.energy.gov/cmei/systems/solar-integration-distributed-energy-resources-and-microgrids-basics", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source prose, photographs, or diagrams reused; third-party assets and marks are not assumed reusable.", "usage": "Factual support for original explanations of inverters, backup operation, and distributed generation.", "attribution": "U.S. Department of Energy, Solar Integration: Distributed Energy Resources and Microgrids Basics (date not stated).", "modifications": "None to source material. All prose and drawings are original.", "family": "electricity" }, { "id": "neso-inertia", "title": "What is inertia?", "institution": "National Energy System Operator (Great Britain)", "url": "https://www.neso.energy/energy-101/electricity-explained/how-do-we-balance-grid/what-inertia", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only; copyright remains with the named institution. No source prose, photographs, diagrams, or marks reproduced.", "usage": "Primary factual reference for independently written educational explanations and clearly labelled illustrative examples.", "attribution": "National Energy System Operator (Great Britain), What is inertia? (Not stated).", "modifications": "None to source material. All explanations and teaching examples are original.", "family": "electricity" }, { "id": "cpuc-demand-response", "title": "Demand Response (DR)", "institution": "California Public Utilities Commission", "url": "https://www.cpuc.ca.gov/industries-and-topics/electrical-energy/electric-costs/demand-response", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only; copyright remains with the named institution. No source prose, photographs, diagrams, or marks reproduced.", "usage": "Primary factual reference for independently written educational explanations and clearly labelled illustrative examples.", "attribution": "California Public Utilities Commission, Demand Response (DR) (Not stated).", "modifications": "None to source material. All explanations and teaching examples are original.", "family": "electricity" }, { "id": "water-cdc-treatment", "title": "How Water Treatment Works", "institution": "US Centers for Disease Control and Prevention", "url": "https://www.cdc.gov/drinking-water/about/how-water-treatment-works.html", "date": "2026-11-10", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Centers for Disease Control and Prevention — How Water Treatment Works", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-who-safety", "title": "Water safety planning", "institution": "World Health Organization", "url": "https://www.who.int/teams/environment-climate-change-and-health/water-sanitation-and-health/water-safety-and-quality/water-safety-planning", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "World Health Organization — Water safety planning", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-source", "title": "Basic Information about Source Water Protection", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/sourcewaterprotection/basic-information-about-source-water-protection", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Basic Information about Source Water Protection", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-usgs-groundwater", "title": "Groundwater Flow and the Water Cycle", "institution": "US Geological Survey, Water Science School", "url": "https://www.usgs.gov/water-science-school/science/groundwater-flow-and-water-cycle", "date": "2026-09-17", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Geological Survey, Water Science School — Groundwater Flow and the Water Cycle", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-nhmrc-coagulation", "title": "8.3.2 Coagulation and flocculation", "institution": "Australian National Health and Medical Research Council", "url": "https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-2/chapter-8/8.3-overview-of-chemical-treatment-processes/8.3.2-coagulation-and-flocculation", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Australian National Health and Medical Research Council — 8.3.2 Coagulation and flocculation", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-oregon-treatment", "title": "Surface Water Treatment: Optimization, Training and Other Resources", "institution": "Oregon Health Authority", "url": "https://www.oregon.gov/oha/PH/HEALTHYENVIRONMENTS/DRINKINGWATER/OPERATIONS/TREATMENT/Pages/index.aspx", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Oregon Health Authority — Surface Water Treatment: Optimization, Training and Other Resources", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-seqwater-treatment", "title": "Water treatment", "institution": "Seqwater", "url": "https://www.seqwater.com.au/water-treatment", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Seqwater — Water treatment", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-technologies", "title": "Overview of Drinking Water Treatment Technologies", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/sdwa/overview-drinking-water-treatment-technologies", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Overview of Drinking Water Treatment Technologies", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-residuals", "title": "Drinking Water Treatment Plant Residuals Management: Technical Report", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/sites/default/files/2015-11/documents/dw-treatment-residuals-mgmt-tech-report-sept-2011.pdf", "date": "2011-09", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Drinking Water Treatment Plant Residuals Management: Technical Report", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-cdc-disinfection", "title": "About Water Disinfection with Chlorine and Chloramine", "institution": "US Centers for Disease Control and Prevention", "url": "https://www.cdc.gov/drinking-water/about/about-water-disinfection-with-chlorine-and-chloramine.html", "date": "2026-11-10", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Centers for Disease Control and Prevention — About Water Disinfection with Chlorine and Chloramine", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-wa-disinfection", "title": "Drinking Water Disinfection", "institution": "Washington State Department of Health", "url": "https://doh.wa.gov/community-and-environment/drinking-water/disinfection", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Washington State Department of Health — Drinking Water Disinfection", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-sydney-pressure", "title": "Water Pressure Management Program", "institution": "Sydney Water", "url": "https://www.sydneywater.com.au/residential/community/projects-in-your-area/water-pressure-management-program.html", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Sydney Water — Water Pressure Management Program", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-sydney-planning", "title": "Water System Planning Guideline", "institution": "Sydney Water", "url": "https://www.sydneywater.com.au/content/dam/sydneywater/documents/provider-information/standards-specifications/water-system-planning-guideline.pdf", "date": "2014-09", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Sydney Water — Water System Planning Guideline", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-age", "title": "Protecting Water Quality Through Water Age Management", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/system/files/documents/2022-04/ds-toolbox-fact-sheets_water-age-mgt_final-508_revised.pdf", "date": "2022-04", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Protecting Water Quality Through Water Age Management", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-survey", "title": "How to Conduct a Sanitary Survey of Drinking Water Systems", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/sites/default/files/2019-08/documents/sanitary_survey_learners_guide_508_8.27.19.pdf", "date": "2019-08", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — How to Conduct a Sanitary Survey of Drinking Water Systems", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-distribution", "title": "Drinking Water Distribution System Tools and Resources", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/dwreginfo/drinking-water-distribution-system-tools-and-resources", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Drinking Water Distribution System Tools and Resources", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-pressure", "title": "Protecting Water Quality Through Distribution System Pressure Management", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/system/files/documents/2021-12/ds-toolbox-fact-sheets_pressure-management.pdf", "date": "2021-12", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Protecting Water Quality Through Distribution System Pressure Management", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-melbourne-sewers", "title": "Where your sewage goes", "institution": "Melbourne Water", "url": "https://www.melbournewater.com.au/water-and-environment/water-management/sewerage/where-your-sewage-goes", "date": "2023-05-09", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Melbourne Water — Where your sewage goes", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-wastewater", "title": "Municipal Wastewater", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/npdes/municipal-wastewater", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Municipal Wastewater", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-primer", "title": "Primer for Municipal Wastewater Treatment Systems", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/sites/default/files/2015-09/documents/primer.pdf", "date": "2004-09", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Primer for Municipal Wastewater Treatment Systems", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-wa-wastewater", "title": "How wastewater is treated", "institution": "Water Corporation, Western Australia", "url": "https://www.watercorporation.com.au/Our-water/Wastewater/How-wastewater-is-treated", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Water Corporation, Western Australia — How wastewater is treated", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-melbourne-eastern", "title": "Eastern Treatment Plant", "institution": "Melbourne Water", "url": "https://www.melbournewater.com.au/water-and-environment/water-management/sewerage/eastern-treatment-plant", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Melbourne Water — Eastern Treatment Plant", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-biosolids", "title": "Basic Information about Sewage Sludge and Biosolids", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/biosolids/basic-information-about-sewage-sludge-and-biosolids", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Basic Information about Sewage Sludge and Biosolids", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-melbourne-digestion", "title": "Primary treatment of sewage and anaerobic treatment of sludge", "institution": "Melbourne Water", "url": "https://www.youtube.com/watch?v=--GS_djOzcg", "date": "2016-05-25", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "Melbourne Water — Primary treatment of sewage and anaerobic treatment of sludge", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-reuse", "title": "Basic Information about Water Reuse", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/waterreuse/basic-information-about-water-reuse", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Environmental Protection Agency — Basic Information about Water Reuse", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-cdc-reuse", "title": "Recycled Water for Drinking: An Overview", "institution": "US Centers for Disease Control and Prevention", "url": "https://www.cdc.gov/drinking-water/about/recycled-water-for-drinking-an-overview.html", "date": "2026-11-10", "accessed": "2026-11-13", "license": "Reference only. No permission to reuse source text, images, branding or diagrams is assumed; source assets are not reproduced.", "usage": "Factual reference for original explanations. No quotation or third-party visual asset is used.", "attribution": "US Centers for Disease Control and Prevention — Recycled Water for Drinking: An Overview", "modifications": "None to the source. Explanations and conceptual diagrams are newly authored.", "family": "water" }, { "id": "water-epa-audits", "title": "Water Audits and Water Loss Control for Public Water Systems", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/sites/default/files/2015-04/documents/epa816f13002.pdf", "date": "2013-07", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Established water-balance terminology only; historical statistics and cost estimates are not adopted as current facts.", "attribution": "US Environmental Protection Agency — Water Audits and Water Loss Control for Public Water Systems", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-wa-loss", "title": "WUE: Leakage and Water Loss", "institution": "Washington State Department of Health", "url": "https://doh.wa.gov/community-and-environment/drinking-water/water-system-design-and-planning/water-use-efficiency/leakage-and-water-loss", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Factual reference for original explanations; no source text, images, diagrams or branding reproduced.", "attribution": "Washington State Department of Health — WUE: Leakage and Water Loss", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-epa-flow-monitoring", "title": "Leak Detection and Flow Monitoring Devices", "institution": "US Environmental Protection Agency, WaterSense", "url": "https://www.epa.gov/watersense/leak-detection-and-flow-monitoring-devices", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Factual reference for original explanations; no source text, images, diagrams or branding reproduced.", "attribution": "US Environmental Protection Agency, WaterSense — Leak Detection and Flow Monitoring Devices", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-epa-online-monitoring", "title": "Online Water Quality Monitoring Resources", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/waterresilience/online-water-quality-monitoring-resources", "date": "2026-09-21", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Factual reference for original explanations; no source text, images, diagrams or branding reproduced.", "attribution": "US Environmental Protection Agency — Online Water Quality Monitoring Resources", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-epa-sensor-guidance", "title": "Online Water Quality Monitoring in Distribution Systems", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/sites/default/files/2018-05/documents/owqm-ds_guidance_042018.pdf", "date": "2018-04; second release 2019", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Factual explanation of monitoring parameters, data validation and alert investigation. Publication and revision dates are distinguished in the document.", "attribution": "US Environmental Protection Agency — Online Water Quality Monitoring in Distribution Systems", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-epa-timeseries", "title": "Exploratory Analysis of Time-Series Data to Prepare for Real-Time Online Water Quality Monitoring", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/sites/default/files/2016-11/documents/exploratory_analysis_of_time-series_data_for_owqm.pdf", "date": "2016-11", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Factual reference for original explanations; no source text, images, diagrams or branding reproduced.", "attribution": "US Environmental Protection Agency — Exploratory Analysis of Time-Series Data to Prepare for Real-Time Online Water Quality Monitoring", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-seqwater-desalination", "title": "Desalination in South East Queensland: Fact Sheet", "institution": "Seqwater", "url": "https://www.seqwater.com.au/sites/default/files/2023-12/2023%20Desalination%20fact%20sheet%20-%20UPDATED_0.pdf", "date": "2023-12", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Process sequence used as a regional example only; expansion plans, historic output figures and broad environmental assurances are not adopted as current or universal claims.", "attribution": "Seqwater — Desalination in South East Queensland: Fact Sheet", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-corporation-desalination", "title": "How does water desalination work?", "institution": "Water Corporation, Western Australia", "url": "https://www.watercorporation.com.au/our-water/desalination", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Reference for membrane desalination, concentrate handling and site-specific marine monitoring; promotional comparisons and numerical environmental claims are not reproduced.", "attribution": "Water Corporation, Western Australia — How does water desalination work?", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-epa-stormwater", "title": "Sources and Solutions: Stormwater", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/nutrientpollution/sources-and-solutions-stormwater", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Factual reference for original explanations; no source text, images, diagrams or branding reproduced.", "attribution": "US Environmental Protection Agency — Sources and Solutions: Stormwater", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-epa-green-infrastructure", "title": "About Green Infrastructure", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/green-infrastructure/about-green-infrastructure", "date": "2026-09-11", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Factual reference for original explanations; no source text, images, diagrams or branding reproduced.", "attribution": "US Environmental Protection Agency — About Green Infrastructure", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-epa-infiltration", "title": "Green Infrastructure and Groundwater Protection", "institution": "US Environmental Protection Agency", "url": "https://www.epa.gov/green-infrastructure/green-infrastructure-and-groundwater-protection", "date": "2026-02-10", "accessed": "2026-11-13", "license": "Reference only. No source-asset reuse permission is assumed or needed; source text and visual assets are not reproduced.", "usage": "Factual reference for original explanations; no source text, images, diagrams or branding reproduced.", "attribution": "US Environmental Protection Agency — Green Infrastructure and Groundwater Protection", "modifications": "None to the source. New explanations and illustrative examples are original.", "family": "water" }, { "id": "water-usgs-desalination", "title": "Desalination", "institution": "U.S. Geological Survey, Water Science School", "url": "https://www.usgs.gov/water-science-school/science/desalination", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source prose, photographs, diagrams or other assets reproduced.", "usage": "Supports the stable distinction between thermal evaporation/condensation and membrane desalination. Historical production figures, cost comparisons and simplified molecular descriptions are not adopted.", "attribution": "U.S. Geological Survey, Water Science School, Desalination.", "modifications": "Original explanatory prose; no source assets modified.", "family": "water" }, { "id": "water-lbnl-desalination-energy", "title": "Volume 1: Survey of Available Information in Support of the Energy-Water Bandwidth Study of Desalination Systems", "institution": "Lawrence Berkeley National Laboratory and U.S. Department of Energy", "url": "https://eta-publications.lbl.gov/sites/default/files/lbnl-1006424.pdf", "date": "2016-10", "accessed": "2026-11-13", "license": "Reference only. No source prose, photographs, diagrams or other assets reproduced.", "usage": "Supports the physical role of recovering pressure energy from reverse-osmosis concentrate. Historical efficiency percentages, costs and technology rankings are not adopted.", "attribution": "Rao et al., Lawrence Berkeley National Laboratory, LBNL-1006424, October 2016.", "modifications": "Original explanatory prose; no source assets modified.", "family": "water" }, { "id": "isoc-how", "title": "How the Internet Works", "institution": "Internet Society", "url": "https://www.internetsociety.org/our-work/how-the-internet-works/", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No text, photographs, or other assets reused; no blanket commercial asset license assumed.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "Internet Society, How the Internet Works (Not stated).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "isoc-properties", "title": "The Internet Way of Networking: Defining the critical properties of the Internet", "institution": "Internet Society", "url": "https://www.internetsociety.org/resources/doc/2020/internet-impact-assessment-toolkit/critical-properties-of-the-internet/", "date": "2020-09-09", "accessed": "2026-11-13", "license": "Reference only. No text, photographs, or other assets reused.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "Internet Society, The Internet Way of Networking: Defining the critical properties of the Internet (2020-09-09).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-1034", "title": "RFC 1034: Domain names — concepts and facilities", "institution": "IETF / RFC Editor; P. Mockapetris", "url": "https://www.rfc-editor.org/rfc/rfc1034", "date": "1987-11", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "P. Mockapetris, RFC 1034: Domain names — concepts and facilities (1987-11).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-1122", "title": "RFC 1122: Requirements for Internet Hosts — Communication Layers", "institution": "IETF / RFC Editor; R. Braden (editor)", "url": "https://www.rfc-editor.org/rfc/rfc1122", "date": "1989-10", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "R. Braden (editor), RFC 1122: Requirements for Internet Hosts — Communication Layers (1989-10).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-8200", "title": "RFC 8200: Internet Protocol, Version 6 (IPv6) Specification", "institution": "IETF / RFC Editor; S. Deering and R. Hinden", "url": "https://www.rfc-editor.org/rfc/rfc8200", "date": "2017-07", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "S. Deering and R. Hinden, RFC 8200: Internet Protocol, Version 6 (IPv6) Specification (2017-07).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-1812", "title": "RFC 1812: Requirements for IP Version 4 Routers", "institution": "IETF / RFC Editor; F. Baker (editor)", "url": "https://www.rfc-editor.org/rfc/rfc1812", "date": "1995-06", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "F. Baker (editor), RFC 1812: Requirements for IP Version 4 Routers (1995-06).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-4271", "title": "RFC 4271: A Border Gateway Protocol 4 (BGP-4)", "institution": "IETF / RFC Editor; Y. Rekhter, T. Li, and S. Hares (editors)", "url": "https://www.rfc-editor.org/rfc/rfc4271", "date": "2006-01", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "Y. Rekhter, T. Li, and S. Hares (editors), RFC 4271: A Border Gateway Protocol 4 (BGP-4) (2006-01).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-9293", "title": "RFC 9293: Transmission Control Protocol (TCP)", "institution": "IETF / RFC Editor; W. Eddy (editor)", "url": "https://www.rfc-editor.org/rfc/rfc9293", "date": "2022-08", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "W. Eddy (editor), RFC 9293: Transmission Control Protocol (TCP) (2022-08).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-768", "title": "RFC 768: User Datagram Protocol", "institution": "IETF / RFC Editor; J. Postel", "url": "https://www.rfc-editor.org/rfc/rfc768", "date": "1980-08", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "J. Postel, RFC 768: User Datagram Protocol (1980-08).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-9000", "title": "RFC 9000: QUIC — A UDP-Based Multiplexed and Secure Transport", "institution": "IETF / RFC Editor; J. Iyengar and M. Thomson (editors)", "url": "https://www.rfc-editor.org/info/rfc9000", "date": "2021-05", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "J. Iyengar and M. Thomson (editors), RFC 9000: QUIC — A UDP-Based Multiplexed and Secure Transport (2021-05).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-9846", "title": "RFC 9846: The Transport Layer Security (TLS) Protocol Version 1.3", "institution": "IETF / RFC Editor; E. Rescorla", "url": "https://www.rfc-editor.org/rfc/rfc9846", "date": "2026-07", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "E. Rescorla, RFC 9846: The Transport Layer Security (TLS) Protocol Version 1.3 (2026-07).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-9110", "title": "RFC 9110: HTTP Semantics", "institution": "IETF / RFC Editor; R. Fielding, M. Nottingham, and J. Reschke (editors)", "url": "https://www.rfc-editor.org/rfc/rfc9110", "date": "2022-06", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "R. Fielding, M. Nottingham, and J. Reschke (editors), RFC 9110: HTTP Semantics (2022-06).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-9111", "title": "RFC 9111: HTTP Caching", "institution": "IETF / RFC Editor; R. Fielding, M. Nottingham, and J. Reschke (editors)", "url": "https://www.rfc-editor.org/rfc/rfc9111", "date": "2022-06", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "R. Fielding, M. Nottingham, and J. Reschke (editors), RFC 9111: HTTP Caching (2022-06).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-9114", "title": "RFC 9114: HTTP/3", "institution": "IETF / RFC Editor; M. Bishop (editor)", "url": "https://www.rfc-editor.org/rfc/rfc9114", "date": "2022-06", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC prose, code, tables, or diagrams reproduced.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "M. Bishop (editor), RFC 9114: HTTP/3 (2022-06).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "mdn-browser", "title": "Populating the page: how browsers work", "institution": "MDN Web Docs / Mozilla contributors", "url": "https://developer.mozilla.org/en-US/docs/Web/Performance/Guides/How_browsers_work", "date": "Not stated", "accessed": "2026-11-13", "license": "MDN documentation is generally CC BY-SA 2.5 or later. Reference only: no source prose or images reproduced; independently written factual explanation.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "MDN Web Docs / Mozilla contributors, Populating the page: how browsers work (Not stated).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "icann-role", "title": "What Does ICANN Do?", "institution": "ICANN", "url": "https://www.icann.org/resources/pages/what-2012-02-25-en", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. No source prose or assets reproduced; no blanket commercial asset license assumed.", "usage": "Technical facts checked for an independently written explanation. No source assets reused.", "attribution": "ICANN, What Does ICANN Do? (Not stated).", "modifications": "None to the source. All teaching prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-9499", "title": "RFC 9499: DNS Terminology", "institution": "IETF / RFC Editor; P. Hoffman and K. Fujiwara", "url": "https://www.rfc-editor.org/rfc/rfc9499", "date": "2024-03", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC text, code, or diagrams reproduced.", "usage": "Technical reference supporting independently written explanations of DNS terminology and security distinctions.", "attribution": "P. Hoffman and K. Fujiwara, RFC 9499: DNS Terminology (2024-03).", "modifications": "None to source material. All prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-4033", "title": "RFC 4033: DNS Security Introduction and Requirements", "institution": "IETF / RFC Editor; R. Arends, R. Austein, M. Larson, D. Massey, and S. Rose", "url": "https://www.rfc-editor.org/rfc/rfc4033", "date": "2005-03", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC text, code, or diagrams reproduced.", "usage": "Technical reference supporting independently written explanations of DNS terminology and security distinctions.", "attribution": "R. Arends, R. Austein, M. Larson, D. Massey, and S. Rose, RFC 4033: DNS Security Introduction and Requirements (2005-03).", "modifications": "None to source material. All prose and conceptual schematics are original.", "family": "internet" }, { "id": "rfc-8484", "title": "RFC 8484: DNS Queries over HTTPS (DoH)", "institution": "IETF / RFC Editor; P. Hoffman and P. McManus", "url": "https://www.rfc-editor.org/rfc/rfc8484", "date": "2018-10", "accessed": "2026-11-13", "license": "Copyright holders and reuse terms are stated in the linked RFC. Reference only: no RFC text, code, or diagrams reproduced.", "usage": "Technical reference supporting independently written explanations of DNS terminology and security distinctions.", "attribution": "P. Hoffman and P. McManus, RFC 8484: DNS Queries over HTTPS (DoH) (2018-10).", "modifications": "None to source material. All prose and conceptual schematics are original.", "family": "internet" }, { "id": "corning-fibre", "title": "Optical Fiber Glossary of Terms", "institution": "Corning Incorporated", "url": "https://www.corning.com/optical-communications/worldwide/en/home/products/fiber/optical-fiber-resource-center/glossary-of-terms.html", "date": "Not stated", "accessed": "2026-11-13", "license": "Reference only. Copyright and source-specific terms remain with the named authors or institution; no text, code, tables, images, or diagrams reproduced.", "usage": "Primary factual reference supporting independently written technical explanations and clearly labelled illustrative examples.", "attribution": "Corning Incorporated, Optical Fiber Glossary of Terms (Not stated).", "modifications": "None to source material. All prose, examples, and conceptual drawings are original.", "family": "internet" }, { "id": "nobel-fibre", "title": "The Nobel Prize in Physics 2009: Information for the Public", "institution": "Royal Swedish Academy of Sciences", "url": "https://www.nobelprize.org/uploads/2018/06/popular-physicsprize2009-1.pdf", "date": "2009", "accessed": "2026-11-13", "license": "Reference only. Copyright and source-specific terms remain with the named authors or institution; no text, code, tables, images, or diagrams reproduced.", "usage": "Primary factual reference supporting independently written technical explanations and clearly labelled illustrative examples.", "attribution": "Royal Swedish Academy of Sciences, The Nobel Prize in Physics 2009: Information for the Public (2009).", "modifications": "None to source material. All prose, examples, and conceptual drawings are original.", "family": "internet" }, { "id": "rfc-2681", "title": "RFC 2681: A Round-trip Delay Metric for IPPM", "institution": "IETF / RFC Editor; G. Almes, S. Kalidindi, and M. Zekauskas", "url": "https://www.rfc-editor.org/rfc/rfc2681", "date": "1999-09", "accessed": "2026-11-13", "license": "Reference only. Copyright and source-specific terms remain with the named authors or institution; no text, code, tables, images, or diagrams reproduced.", "usage": "Primary factual reference supporting independently written technical explanations and clearly labelled illustrative examples.", "attribution": "IETF / RFC Editor; G. Almes, S. Kalidindi, and M. Zekauskas, RFC 2681: A Round-trip Delay Metric for IPPM (1999-09).", "modifications": "None to source material. All prose, examples, and conceptual drawings are original.", "family": "internet" }, { "id": "rfc-5681", "title": "RFC 5681: TCP Congestion Control", "institution": "IETF / RFC Editor; M. Allman, V. Paxson, and E. Blanton", "url": "https://www.rfc-editor.org/rfc/rfc5681", "date": "2009-09", "accessed": "2026-11-13", "license": "Reference only. Copyright and source-specific terms remain with the named authors or institution; no text, code, tables, images, or diagrams reproduced.", "usage": "Primary factual reference supporting independently written technical explanations and clearly labelled illustrative examples.", "attribution": "IETF / RFC Editor; M. Allman, V. Paxson, and E. Blanton, RFC 5681: TCP Congestion Control (2009-09).", "modifications": "None to source material. All prose, examples, and conceptual drawings are original.", "family": "internet" }, { "id": "rfc-7567", "title": "RFC 7567: IETF Recommendations Regarding Active Queue Management", "institution": "IETF / RFC Editor; F. Baker and G. Fairhurst (editors)", "url": "https://www.rfc-editor.org/rfc/rfc7567", "date": "2015-07", "accessed": "2026-11-13", "license": "Reference only. Copyright and source-specific terms remain with the named authors or institution; no text, code, tables, images, or diagrams reproduced.", "usage": "Primary factual reference supporting independently written technical explanations and clearly labelled illustrative examples.", "attribution": "IETF / RFC Editor; F. Baker and G. Fairhurst (editors), RFC 7567: IETF Recommendations Regarding Active Queue Management (2015-07).", "modifications": "None to source material. All prose, examples, and conceptual drawings are original.", "family": "internet" }, { "id": "etsi-5g-release15", "title": "ETSI TR 121 915 V15.0.0: Release description, Release 15", "institution": "ETSI / 3GPP", "url": "https://www.etsi.org/deliver/etsi_tr/121900_121999/121915/15.00.00_60/tr_121915v150000p.pdf", "date": "2019-10", "accessed": "2026-11-13", "license": "Reference only. Copyright and source-specific terms remain with the named authors or institution; no text, code, tables, images, or diagrams reproduced.", "usage": "Primary factual reference supporting independently written technical explanations and clearly labelled illustrative examples.", "attribution": "ETSI / 3GPP, ETSI TR 121 915 V15.0.0: Release description, Release 15 (2019-10).", "modifications": "None to source material. All prose, examples, and conceptual drawings are original.", "family": "internet" }, { "id": "etsi-5g-media", "title": "ETSI TR 126 919 V19.0.0: Study on media handling aspects of conversational services in 5G systems", "institution": "ETSI / 3GPP", "url": "https://www.etsi.org/deliver/etsi_tr/126900_126999/126919/19.00.00_60/tr_126919v190000p.pdf", "date": "2025-10", "accessed": "2026-11-13", "license": "Reference only. Copyright and source-specific terms remain with the named authors or institution; no text, code, tables, images, or diagrams reproduced.", "usage": "Primary factual reference supporting independently written technical explanations and clearly labelled illustrative examples.", "attribution": "ETSI / 3GPP, ETSI TR 126 919 V19.0.0: Study on media handling aspects of conversational services in 5G systems (2025-10).", "modifications": "None to source material. All prose, examples, and conceptual drawings are original.", "family": "internet" }, { "id": "rail-src-access", "title": "Plan an accessible journey", "institution": "Transport for London", "url": "https://tfl.gov.uk/help-with-travel/accessible-and-step-free-travel/plan-an-accessible-journey", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Transport for London", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-stepfree", "title": "Using TfL Go for step-free journeys", "institution": "Transport for London", "url": "https://tfl.gov.uk/plan-a-journey/using-tfl-go", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Transport for London", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-stations", "title": "Review of Transit Station Design Guidelines", "institution": "National Academies of Sciences, Engineering, and Medicine / Transportation Research Board", "url": "https://www.nationalacademies.org/publications/29499", "date": "2026", "accessed": "2026-11-13", "license": "Copyright National Academy of Sciences. Factual reference only; no licensed figures or text reproduced.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "National Academies of Sciences, Engineering, and Medicine / Transportation Research Board", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-capacity", "title": "Transit Capacity and Quality of Service Manual, Third Edition, Chapter 8: Rail Transit Capacity", "institution": "Transportation Research Board / National Academies", "url": "https://onlinepubs.trb.org/onlinepubs/tcrp/tcrp_rpt_165ch-08.pdf", "date": "2013", "accessed": "2026-11-13", "license": "Copyright National Academy of Sciences; reproduction permissions are limited. No source figures, tables or prose reused.", "usage": "Established relationship between station dwell, train separation and operating margin. This is an older edition, not a claim to be current design guidance.", "attribution": "Transportation Research Board / National Academies", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-capacity-current", "title": "Transit Capacity and Quality of Service Manual, Fourth Edition", "institution": "National Academies of Sciences, Engineering, and Medicine / Transportation Research Board", "url": "https://www.nationalacademies.org/publications/29449", "date": "2026", "accessed": "2026-11-13", "license": "Copyright National Academy of Sciences. No source figures, tables or prose reused.", "usage": "Current edition identified for further reading; our teaching scenario is an original simplification, not the manual’s engineering method.", "attribution": "National Academies of Sciences, Engineering, and Medicine / Transportation Research Board", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-signals", "title": "Signals explained", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/stories/signals-explained/", "date": "2018-09-05", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-detection", "title": "Track circuits explained", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/stories/track-circuits-explained/", "date": "2019-09-30", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-points", "title": "Signals and points failure", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/rail-travel/delays-explained/signals-and-points-failure/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-cbtc", "title": "20-Year Needs Assessment: New York City Transit appendix", "institution": "Metropolitan Transportation Authority", "url": "https://future.mta.info/documents/20-YearNeedsAssessment_NewYorkCityTransit.pdf", "date": "2023", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Metropolitan Transportation Authority", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-thirdrail", "title": "Third rail", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/our-work/looking-after-the-railway/track/third-rail/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-overhead", "title": "Electrification", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/our-work/living-by-the-railway/electrification/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-regen", "title": "Recycled energy on Tube trains (2)", "institution": "London Assembly / Mayor of London", "url": "https://www.london.gov.uk/who-we-are/what-london-assembly-does/questions-mayor/find-an-answer/recycled-energy-tube-trains-2", "date": "2015-11-23", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "London Assembly / Mayor of London", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-sleepers", "title": "A greener railway: more environmentally friendly sleepers", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/stories/a-greener-railway-environmentally-friendly-sleepers/", "date": "2024-07-24", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-track", "title": "Track treatment fleet", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/our-work/looking-after-the-railway/our-fleet-machines-and-vehicles/track-treatment-fleet/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-heat", "title": "Buckled rail and summer heat", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/rail-travel/delays-explained/buckled-rail-and-summer-heat/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-timetable", "title": "The timetable", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/industry-and-commercial/the-timetable/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-rules", "title": "Operational Rules", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/industry-and-commercial/information-for-operators/operational-rules/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-delays", "title": "Knock-on delays", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/rail-travel/delays-explained/knock-on-delays/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-information", "title": "How we keep you updated when there’s a delay", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/rail-travel/delays-explained/how-we-keep-you-updated-when-theres-a-delay/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-maintenance", "title": "Planned works", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/our-work/looking-after-the-railway/planned-works/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference only; no text, photographs, maps, branding or diagrams reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-axles", "title": "Axle counting systems", "institution": "Siemens Mobility", "url": "https://www.mobility.siemens.com/uk/en/portfolio/rail-infrastructure/components/axle-counting-systems.html", "date": "Not stated", "usage": "Manufacturer’s description used for the basic counting mechanism only; no performance or promotional claims adopted.", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "attribution": "Siemens Mobility", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-fourthrail", "title": "London Underground: Safety Certification and Safety Authorisation, version 6.2", "institution": "London Underground / Transport for London", "url": "https://tfl.gov.uk/cdn/static/cms/documents/london-underground-safety-certificate-and-safety-authorisation.pdf", "date": "2022", "usage": "Glossary evidence for the third- and fourth-conductor-rail arrangement only; no operational procedures reproduced.", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "attribution": "London Underground / Transport for London", "modifications": "No source asset modified. Explanations and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-depot-operations", "title": "Behind the scenes: Sydney Metro operations", "institution": "Sydney Metro / Transport for NSW", "url": "https://www.sydneymetro.info/article/behind-scenes-sydney-metro-operations", "date": "2022-08-24", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Factual reference for stabling, operational staffing and train preparation. Historic service counts and future opening statements are not adopted as current facts.", "attribution": "Sydney Metro / Transport for NSW", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-depot-south", "title": "Construction completed at Sydney Metro Trains Facility South", "institution": "Sydney Metro / Transport for NSW", "url": "https://www.sydneymetro.info/sites/default/files/2024-06/SC_FINAL_SMTF_S_Newsletter_June_24.pdf", "date": "2024-06", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Completed facility functions: stabling, cleaning, light maintenance and water management. No photographs, drawings or claimed future service dates reproduced.", "attribution": "Sydney Metro / Transport for NSW", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-turnbacks", "title": "Through-Running Regional Rail: Results, section 9, Turnback Operations", "institution": "National Academies of Sciences, Engineering, and Medicine / Transportation Research Board", "url": "https://www.nationalacademies.org/read/29479/chapter/4", "date": "2026", "accessed": "2026-11-13", "license": "Copyright National Academy of Sciences; no source figures, tables or prose reused.", "usage": "Reference for terminal occupation, recovery allowance and turnbacks as capacity constraints; regional-rail context identified. No source tables or illustrations reproduced.", "attribution": "National Academies of Sciences, Engineering, and Medicine / Transportation Research Board", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-hunter-turnback", "title": "Hunter Street Station Newsletter: turnback tunnels", "institution": "Sydney Metro / Transport for NSW", "url": "https://www.sydneymetro.info/sites/default/files/2024-06/Hunter_Street_Newsletter_June%202024.pdf", "date": "2024-06", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Illustrates the purpose of a planned turnback beyond a station. Construction-era description; no claim that the project is currently open. No source artwork reused.", "attribution": "Sydney Metro / Transport for NSW", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-ventilation-crossrail", "title": "Information Paper A4: Ventilation and Intervention Shafts, version 2", "institution": "Crossrail", "url": "https://learninglegacy.crossrail.co.uk/wp-content/uploads/2023/03/a4ventilationandinterventionshafts.pdf", "date": "2007-11-20", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Historical planning document used for the distinction between ventilation, pressure relief, comfort and smoke-control objectives. Not current operational guidance. No drawings or safety procedures reproduced.", "attribution": "Crossrail", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-ventilation-central", "title": "Aboriginal artwork adorns Central Station ventilation buildings", "institution": "Sydney Metro / Transport for NSW", "url": "https://www.sydneymetro.info/article/aboriginal-artwork-adorns-central-station-ventilation-buildings", "date": "2022-09-15", "accessed": "2026-11-13", "license": "Copyright and artwork rights remain with their respective owners; no asset reuse permission assumed or required for this factual reference.", "usage": "Only the stated ventilation function of the buildings informs the explanation. No photographs, artwork, cultural designs or artist quotations are reused.", "attribution": "Sydney Metro / Transport for NSW", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-thermal-design", "title": "The Design of Thermal Tunnel Energy Segments for Crossrail", "institution": "Duncan P Nicholson, Qing Chen, Mike de Silva, Alan Winter and Ralf Winterling; Crossrail Learning Legacy / ICE Publishing", "url": "https://learninglegacy.crossrail.co.uk/documents/the-design-of-thermal-tunnel-energy-segments-for-crossrail/", "date": "2014-11-03", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Reference for train heat sources and the distinction between ventilation and other heat-management approaches. A design study, not a claim of deployment. No figures, equations or prose copied.", "attribution": "Duncan P Nicholson, Qing Chen, Mike de Silva, Alan Winter and Ralf Winterling; Crossrail Learning Legacy / ICE Publishing", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-flooding", "title": "Flooding", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/rail-travel/delays-explained/flooding/", "date": "Not stated", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Reference for water effects on track support, power and signalling and the need for inspection after water recedes. No photos or operational thresholds reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-adaptation", "title": "Fourth Adaptation Report", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/wp-content/uploads/2024/12/Network-Rail-4th-Adaptation-Report-Dec-2024.pdf", "date": "2024-12", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Reference for connected weather risks and location-specific adaptation involving drainage and neighbouring infrastructure. No statistical charts, tables or source artwork reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "rail-src-asset-weather", "title": "Asset Management: Weather Resilience and Climate Change Adaptation Plan", "institution": "Network Rail", "url": "https://www.networkrail.co.uk/wp-content/uploads/2021/11/Asset-management-WRCCA-plan.pdf", "date": "2021-05", "accessed": "2026-11-13", "license": "Copyright retained by the source institution; no asset reuse licence relied upon.", "usage": "Reference for drainage, water ingress and finite pumping capacity under extreme conditions. Historical risk-planning document, not current operating instructions. No figures or prose reproduced.", "attribution": "Network Rail", "modifications": "No source asset modified. Explanations, examples and conceptual diagrams are original.", "family": "rail" }, { "id": "city-src-cisa-irpf", "title": "Infrastructure Resilience Planning Framework (IRPF)", "institution": "Cybersecurity and Infrastructure Security Agency (CISA)", "url": "https://www.cisa.gov/sites/default/files/2025-03/IRPF_3.17.2025.pdf", "date": "2025-03", "accessed": "2026-11-14", "license": "U.S. federal government publication; third-party material and marks may have separate rights. No source asset reuse licence is relied upon.", "usage": "Factual reference for dependencies, backup resources, resilience and recovery considerations, especially pages 4, 21–22 and 28. The fictional city, causal sequences and glossary wording are original; no source diagrams, tables or prose are reproduced.", "attribution": "Cybersecurity and Infrastructure Security Agency, Infrastructure Resilience Planning Framework, March 2025.", "modifications": "No source asset modified. All explanatory text and teaching scenarios are independently authored.", "family": "connected" }, { "id": "city-src-epa-power-resilience", "title": "Power Resilience Guide for Water and Wastewater Utilities", "institution": "U.S. Environmental Protection Agency, Office of Water", "url": "https://www.epa.gov/system/files/documents/2023-05/PowerResilienceGuide_2023_508c.pdf", "date": "2023-05-03", "accessed": "2026-11-14", "license": "U.S. federal government publication; third-party material and marks may have separate rights. No source asset reuse licence is relied upon.", "usage": "Factual reference for electricity-dependent water and wastewater equipment, limits of backup support, communications and cross-utility recovery. EPA's resource page dates this updated file 3 May 2023; its cover is dated March 2023. No generator instructions, operating procedures, case-study figures or source artwork are reproduced.", "attribution": "U.S. Environmental Protection Agency, Power Resilience Guide for Water and Wastewater Utilities, EPA 810-F-23-013, 2023.", "modifications": "No source asset modified. The fictional layouts, outcomes and arithmetic are original illustrative assumptions.", "family": "connected" }, { "id": "city-src-ofcom-weather", "title": "Stay connected in severe weather", "institution": "Ofcom", "url": "https://www.ofcom.org.uk/phones-and-broadband/vulnerable-customers/stay-connected-in-severe-weather", "date": "2026-10-22", "accessed": "2026-11-14", "license": "Copyright retained by Ofcom and other respective rights holders. No source asset reuse licence is relied upon.", "usage": "Factual reference for the electrical dependence of home broadband equipment and possible weather impacts on communications networks. UK-specific consumer entitlements, emergency-call advice and backup durations are not generalized or reproduced.", "attribution": "Ofcom, Stay connected in severe weather, updated 22 October 2026.", "modifications": "No source asset modified. All explanations and fictional examples are original.", "family": "connected" }, { "id": "glossary-src-rfc5136", "title": "RFC 5136: Defining Network Capacity", "institution": "P. Chimento and J. Ishac / Internet Engineering Task Force (IETF)", "url": "https://www.rfc-editor.org/rfc/rfc5136", "date": "2008-02", "accessed": "2026-11-14", "license": "Copyright The IETF Trust (2008); source publication carries its own rights notices. No source text or figure reuse licence is relied upon.", "usage": "Factual reference for the ambiguity of bandwidth, measurement-layer distinctions, network capacity and limiting links. The glossary uses independently written plain-language definitions and original illustrative examples, not copied protocol text.", "attribution": "P. Chimento and J. Ishac, RFC 5136: Defining Network Capacity, IETF, February 2008.", "modifications": "No source asset modified. All prose and accompanying teaching illustrations are original.", "family": "glossary" } ], "assets": [ { "id": "asset-city", "title": "Connected city cutaway", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — city()", "publishedLocation": "/", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Redrawn for edition 1.3 as a black/white/yellow public-works atlas: crisp architectural outlines, neutral grey depth planes, numbered network labels and distinct solid, double, dashed and sleeper-mark routes. Network meanings and highlight/animation controls retained. Original project artwork; no third-party artwork incorporated." }, { "id": "asset-symbol-electricity", "title": "Electricity symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(electricity)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-water", "title": "Water symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(water)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-internet", "title": "Internet symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(internet)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-rail", "title": "Rail symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(rail)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-arrow", "title": "Arrow symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(arrow)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-search", "title": "Search symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(search)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-generator", "title": "Generator symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(generator)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-tower", "title": "Tower symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(tower)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-transformer", "title": "Transformer symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(transformer)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-home", "title": "Home symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(home)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-valve", "title": "Valve symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(valve)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-tank", "title": "Tank symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(tank)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-server", "title": "Server symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(server)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-device", "title": "Device symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(device)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-router", "title": "Router symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(router)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-signal", "title": "Signal symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(signal)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-station", "title": "Station symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(station)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-clock", "title": "Clock symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(clock)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-symbol-network", "title": "Network symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(network)", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-flow-electricity", "title": "Electricity system diagram", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/build.mjs — diagram()", "publishedLocation": "/systems/electricity/#map", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-model-electricity", "title": "Electricity scenario graphic", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "public/assets/model-views.js — modelView()", "publishedLocation": "/scenarios/#lab-electricity", "date": "2026-11-13", "accessed": "2026-11-14", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Interactive and pre-rendered explanatory diagram with accessible description, on the family page and what-if lab. Includes an expanded inspection view.", "attribution": "No external attribution required.", "modifications": "Expanded in edition 1.1 with labelled SVG schematics, visual scales for the illustrative equations, baseline comparisons and full-size inspection. Restyled for edition 1.3 as black/white/yellow square diagrams; the illustrative calculations, scales, assumptions and comparison behaviour are retained. Original project artwork; no external assets incorporated. The edition 1.4 diagram responds to demand and available upward headroom; its capacity threshold and supply/demand bars update with both inputs. A/B comparison reports both chosen inputs and the resulting metrics. All values are original teaching assumptions; no external artwork was incorporated." }, { "id": "asset-flow-water", "title": "Water system diagram", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/build.mjs — diagram()", "publishedLocation": "/systems/water/#map", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-model-water", "title": "Water scenario graphic", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "public/assets/model-views.js — modelView()", "publishedLocation": "/scenarios/#lab-water", "date": "2026-11-13", "accessed": "2026-11-14", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Interactive and pre-rendered explanatory diagram with accessible description, on the family page and what-if lab. Includes an expanded inspection view.", "attribution": "No external attribution required.", "modifications": "Expanded in edition 1.1 with labelled SVG schematics, visual scales for the illustrative equations, baseline comparisons and full-size inspection. Restyled for edition 1.3 as black/white/yellow square diagrams; the illustrative calculations, scales, assumptions and comparison behaviour are retained. Original project artwork; no external assets incorporated. The edition 1.4 diagram responds to elapsed outage time and demand, keeping 600 m³ initial usable storage and zero inflow. Reservoir level, drawdown curve, depletion time and A/B metrics update consistently. All values are original teaching assumptions; no external artwork was incorporated." }, { "id": "asset-flow-internet", "title": "Internet system diagram", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/build.mjs — diagram()", "publishedLocation": "/systems/internet/#map", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-model-internet", "title": "Internet scenario graphic", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "public/assets/model-views.js — modelView()", "publishedLocation": "/scenarios/#lab-internet", "date": "2026-11-13", "accessed": "2026-11-14", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Interactive and pre-rendered explanatory diagram with accessible description, on the family page and what-if lab. Includes an expanded inspection view.", "attribution": "No external attribution required.", "modifications": "Expanded in edition 1.1 with labelled SVG schematics, visual scales for the illustrative equations, baseline comparisons and full-size inspection. Restyled for edition 1.3 as black/white/yellow square diagrams; the illustrative calculations, scales, assumptions and comparison behaviour are retained. Original project artwork; no external assets incorporated. The edition 1.4 diagram responds to preferred-link availability and an assigned one-way delay for the alternate path. Reachability and the chosen delay remain distinct; A/B comparison records both inputs and results. All values are original teaching assumptions; no external artwork was incorporated." }, { "id": "asset-flow-rail", "title": "Rail system diagram", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/build.mjs — diagram()", "publishedLocation": "/systems/rail/#map", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for this edition; no third-party artwork incorporated." }, { "id": "asset-model-rail", "title": "Rail scenario graphic", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "public/assets/model-views.js — modelView()", "publishedLocation": "/scenarios/#lab-rail", "date": "2026-11-13", "accessed": "2026-11-14", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Interactive and pre-rendered explanatory diagram with accessible description, on the family page and what-if lab. Includes an expanded inspection view.", "attribution": "No external attribution required.", "modifications": "Expanded in edition 1.1 with labelled SVG schematics, visual scales for the illustrative equations, baseline comparisons and full-size inspection. Restyled for edition 1.3 as black/white/yellow square diagrams; the illustrative calculations, scales, assumptions and comparison behaviour are retained. Original project artwork; no external assets incorporated. The edition 1.4 diagram responds to repeated added dwell and the planned interval. Occupation blocks, resulting headway, available margin and A/B metrics reflect both inputs. All values are original teaching assumptions; no external artwork was incorporated." }, { "id": "asset-favicon", "title": "Connection mark / favicon", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "public/assets/favicon.svg", "publishedLocation": "/assets/favicon.svg", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Restyled for edition 1.3 as the original black connection mark on an opaque #FFD400 yellow square. Network geometry retained; no third-party artwork incorporated." }, { "id": "asset-social-svg", "title": "Social sharing illustration (SVG)", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "public/assets/social-card.svg", "publishedLocation": "/assets/social-card.svg", "date": "2026-11-13", "accessed": "2026-11-14", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Redesigned for edition 1.3 with black/white/yellow planes, bold Anton headings, Outfit labels and an original numbered network graphic. Retains the 4 systems, 24 journeys and 58 components identity. No third-party artwork or fonts from the design-reference PDF incorporated; the independently sourced licensed Anton and Outfit files are retained. Updated for edition 1.4 to show 24 journeys; visual identity and licensed font provenance retained." }, { "id": "asset-social-png", "title": "Social sharing illustration (PNG)", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/build.mjs + public/assets/social-card.svg", "publishedLocation": "/assets/social-card.png", "date": "2026-11-13", "accessed": "2026-11-14", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Rasterised the edition 1.3 black/white/yellow original social SVG with the project’s independently sourced, licensed Anton and Outfit font files. Preserves the numbered network graphic and 4 systems, 24 journeys and 58 components identity; no external source imagery reused. Updated for edition 1.4 to show 24 journeys; visual identity and licensed font provenance retained." }, { "id": "asset-symbol-battery", "title": "Energy storage symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(\"battery\")", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for expanded edition 1.1; no third-party artwork incorporated." }, { "id": "asset-symbol-wave", "title": "AC waveform symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(\"wave\")", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for expanded edition 1.1; no third-party artwork incorporated." }, { "id": "asset-symbol-meter", "title": "Measurement gauge symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(\"meter\")", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for expanded edition 1.1; no third-party artwork incorporated." }, { "id": "asset-symbol-solar", "title": "Solar panel symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(\"solar\")", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for expanded edition 1.1; no third-party artwork incorporated." }, { "id": "asset-symbol-fan", "title": "Ventilation symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(\"fan\")", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for expanded edition 1.1; no third-party artwork incorporated." }, { "id": "asset-symbol-depot", "title": "Railway depot symbol", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/visuals.mjs — icon(\"depot\")", "publishedLocation": "System, component and navigation interfaces", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "modifications": "Drawn originally for expanded edition 1.1; no third-party artwork incorporated." }, { "id": "asset-favicon-ico", "title": "Browser ICO icon", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/icons.mjs + public/assets/favicon.svg", "publishedLocation": "/favicon.ico", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Browser or device icon derived from the original project network mark.", "attribution": "No external attribution required.", "modifications": "Rasterised the edition 1.3 original black connection mark on its opaque #FFD400 yellow square into 16-, 32- and 48-pixel PNG frames in one ICO container. No third-party artwork incorporated." }, { "id": "asset-favicon-32", "title": "32-pixel browser icon", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/icons.mjs + public/assets/favicon.svg", "publishedLocation": "/assets/favicon-32.png", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Browser or device icon derived from the original project network mark.", "attribution": "No external attribution required.", "modifications": "Rasterised the edition 1.3 original black connection mark on its opaque #FFD400 yellow square into a 32-pixel PNG. No third-party artwork incorporated." }, { "id": "asset-icon-192", "title": "192-pixel application icon", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/icons.mjs + public/assets/favicon.svg", "publishedLocation": "/assets/icon-192.png", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Browser or device icon derived from the original project network mark.", "attribution": "No external attribution required.", "modifications": "Rasterised the edition 1.3 original black connection mark on its opaque #FFD400 yellow square into a 192-pixel PNG. No third-party artwork incorporated." }, { "id": "asset-apple-touch", "title": "Apple touch icon", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "sourceFile": "scripts/icons.mjs + public/assets/favicon.svg", "publishedLocation": "/assets/apple-touch-icon.png", "date": "2026-11-13", "accessed": "2026-11-13", "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Browser or device icon derived from the original project network mark.", "attribution": "No external attribution required.", "modifications": "Rasterised the edition 1.3 original black connection mark on its opaque #FFD400 yellow square into a 180-pixel Apple touch PNG. The source square supplies the visible opaque background; no third-party artwork incorporated." }, { "id": "asset-model-city", "title": "Connected-city dependency model diagram", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "public/assets/city-model.js — cityGraphic() / cityView()", "publishedLocation": "/scenarios/#lab-city", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4: four service nodes, directed dependency links, textual states and original black/white/yellow geometry. The diagram changes with the chosen incident, elapsed time, resilience profile and restored-now snapshot. Companion panels, timeline and ephemeral A/B comparison explain the model. All quantities, exposure rules and recovery gates are editorial teaching assumptions, not source-derived standards or measured events. No source diagrams or artwork incorporated." }, { "id": "asset-glossary-headway", "title": "Headway glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"headway\")", "publishedLocation": "/glossary/#headway", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for headway, paired with an original caption and the existing project clock symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Headway separates trains; dwell measures one train's time at a stop. No third-party artwork incorporated." }, { "id": "asset-glossary-dwell", "title": "Dwell time glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"dwell\")", "publishedLocation": "/glossary/#dwell", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for dwell time, paired with an original caption and the existing project station symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. A longer dwell does not always reduce throughput; it must become a limiting constraint. No third-party artwork incorporated." }, { "id": "asset-glossary-latency", "title": "Latency glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"latency\")", "publishedLocation": "/glossary/#latency", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for latency, paired with an original caption and the existing project clock symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Latency is elapsed time; bandwidth describes a data-carrying rate. No third-party artwork incorporated." }, { "id": "asset-glossary-bandwidth", "title": "Bandwidth glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"bandwidth\")", "publishedLocation": "/glossary/#bandwidth", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for bandwidth, paired with an original caption and the existing project network symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Networking usage differs from radio-frequency bandwidth, which is a frequency range measured in hertz. No third-party artwork incorporated." }, { "id": "asset-glossary-packet", "title": "Packet glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"packet\")", "publishedLocation": "/glossary/#packet", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for packet, paired with an original caption and the existing project router symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. A packet is a delivery unit, not necessarily a complete message, page or file. No third-party artwork incorporated." }, { "id": "asset-glossary-capacity", "title": "Capacity glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"capacity\")", "publishedLocation": "/glossary/#capacity", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for capacity, paired with an original caption and the existing project meter symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Capacity is an available limit; actual use or throughput may be lower. No third-party artwork incorporated." }, { "id": "asset-glossary-power", "title": "Power glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"power\")", "publishedLocation": "/glossary/#power", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for power, paired with an original caption and the existing project electricity symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Power is a rate; energy is the accumulated amount transferred or stored. No third-party artwork incorporated." }, { "id": "asset-glossary-energy", "title": "Energy glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"energy\")", "publishedLocation": "/glossary/#energy", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for energy, paired with an original caption and the existing project battery symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. A kilowatt-hour measures energy; a kilowatt measures power. No third-party artwork incorporated." }, { "id": "asset-glossary-frequency", "title": "Electrical frequency glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"frequency\")", "publishedLocation": "/glossary/#frequency", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for electrical frequency, paired with an original caption and the existing project wave symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Electrical frequency is different from train service frequency, such as departures per hour. No third-party artwork incorporated." }, { "id": "asset-glossary-inertia", "title": "Inertia glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"inertia\")", "publishedLocation": "/glossary/#inertia", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for inertia, paired with an original caption and the existing project generator symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Fast controlled response from an inverter is not automatically the same physical mechanism as rotating inertia. No third-party artwork incorporated." }, { "id": "asset-glossary-pressure", "title": "Water pressure glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"pressure\")", "publishedLocation": "/glossary/#pressure", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for water pressure, paired with an original caption and the existing project meter symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Pressure is not stored volume or flow rate, and it does not certify water quality. No third-party artwork incorporated." }, { "id": "asset-glossary-flow", "title": "Water flow rate glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"flow\")", "publishedLocation": "/glossary/#flow", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for water flow rate, paired with an original caption and the existing project valve symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Flow rate describes volume per time; pressure describes force per area. No third-party artwork incorporated." }, { "id": "asset-glossary-storage", "title": "Storage glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"storage\")", "publishedLocation": "/glossary/#storage", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for storage, paired with an original caption and the existing project tank symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. An inventory does not by itself establish deliverable pressure, power or service quality. No third-party artwork incorporated." }, { "id": "asset-glossary-resilience", "title": "Resilience glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"resilience\")", "publishedLocation": "/glossary/#resilience", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for resilience, paired with an original caption and the existing project network symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Resilience does not mean immunity to failure or an unlimited backup supply. No third-party artwork incorporated." }, { "id": "asset-glossary-redundancy", "title": "Redundancy glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"redundancy\")", "publishedLocation": "/glossary/#redundancy", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for redundancy, paired with an original caption and the existing project network symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. Two lines on a diagram do not prove independent, functioning alternatives. No third-party artwork incorporated." }, { "id": "asset-glossary-dependency", "title": "Dependency glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"dependency\")", "publishedLocation": "/glossary/#dependency", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for dependency, paired with an original caption and the existing project arrow symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. A dependency can be one-way; interdependency describes mutual reliance. No third-party artwork incorporated." }, { "id": "asset-glossary-buffer", "title": "Buffer glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"buffer\")", "publishedLocation": "/glossary/#buffer", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for buffer, paired with an original caption and the existing project tank symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. A buffer delays or absorbs an effect within limits; it does not remove the underlying constraint. No third-party artwork incorporated." }, { "id": "asset-glossary-bottleneck", "title": "Bottleneck glossary illustration", "author": "Invisible Infrastructure project, with AI assistance", "institution": "Invisible Infrastructure", "originalUrl": null, "license": "Original project artwork; no third-party asset restrictions identified. No exclusive copyright claim is made for AI-assisted output.", "usage": "Explanatory visual for this project, including its intended commercial website use. Not documentary evidence.", "attribution": "No external attribution required.", "sourceFile": "scripts/glossary-template.mjs — termIllustration(\"bottleneck\")", "publishedLocation": "/glossary/#bottleneck", "date": "2026-11-14", "accessed": "2026-11-14", "modifications": "Created originally for edition 1.4 as an inline conceptual SVG for bottleneck, paired with an original caption and the existing project station symbol from scripts/visuals.mjs. Geometry is illustrative and not to scale; it is not documentary evidence or a reproduced source figure. The busiest-looking component is not necessarily the constraint limiting the whole service. No third-party artwork incorporated." }, { "id": "anton-font", "type": "font", "family": "Anton", "localPath": "public/assets/fonts/anton-regular.ttf", "originalUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/anton/Anton-Regular.ttf", "repository": "https://github.com/google/fonts/tree/main/ofl/anton", "repositoryBlobSha": "4d65707db9d8663ccfa99cd28cd3a4e0025be178", "author": "The Anton Project Authors", "institution": "Google Fonts official font repository", "date": "Not stated", "consulted": "2026-11-13", "license": "SIL Open Font License 1.1", "licenseUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/anton/OFL.txt", "localLicensePath": "public/assets/fonts/Anton-OFL.txt", "attribution": "Copyright 2020 The Anton Project Authors (https://github.com/googlefonts/AntonFont.git)", "modifications": "None. Original TrueType binary downloaded unchanged; local filename normalised. No PDF fonts extracted.", "weightRange": { "minimum": 400, "maximum": 400, "default": 400 }, "binaryValidation": { "tables": 18, "weight": 400, "axes": [], "bytes": 170812, "sha256": "a4ba3a92350ebb031da0cb47630ac49eb265082ca1bc0450442f4a83ab947cab" } }, { "id": "anton-license", "type": "license-notice", "localPath": "public/assets/fonts/Anton-OFL.txt", "originalUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/anton/OFL.txt", "author": "The Anton Project Authors", "institution": "Google Fonts official font repository", "date": "Not stated", "consulted": "2026-11-13", "license": "SIL Open Font License 1.1", "attribution": "Copyright 2020 The Anton Project Authors (https://github.com/googlefonts/AntonFont.git)", "modifications": "None. Full copyright and license notice retained verbatim.", "sha256": "ee67e6ee22790b7929f1a3769ca2801d565c64b5a9096942c1adf5596de9c9e4" }, { "id": "outfit-font", "type": "font", "family": "Outfit", "localPath": "public/assets/fonts/outfit-variable.ttf", "originalUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/outfit/Outfit%5Bwght%5D.ttf", "repository": "https://github.com/google/fonts/tree/main/ofl/outfit", "repositoryBlobSha": "466d6245f9582df39bf73da91a8b3c938fd061cd", "author": "The Outfit Project Authors", "institution": "Google Fonts official font repository", "date": "Not stated", "consulted": "2026-11-13", "license": "SIL Open Font License 1.1", "licenseUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/outfit/OFL.txt", "localLicensePath": "public/assets/fonts/Outfit-OFL.txt", "attribution": "Copyright 2021 The Outfit Project Authors (https://github.com/Outfitio/Outfit-Fonts)", "modifications": "None. Original TrueType binary downloaded unchanged; local filename normalised. No PDF fonts extracted.", "weightRange": { "minimum": 100, "maximum": 900, "default": 100 }, "binaryValidation": { "tables": 20, "weight": 100, "axes": [ { "tag": "wght", "min": 100, "default": 100, "max": 900 } ], "bytes": 110884, "sha256": "fc7287273e66929776e2ba54f144fe699080bec29f61bf649d70d871468aeade" } }, { "id": "outfit-license", "type": "license-notice", "localPath": "public/assets/fonts/Outfit-OFL.txt", "originalUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/outfit/OFL.txt", "author": "The Outfit Project Authors", "institution": "Google Fonts official font repository", "date": "Not stated", "consulted": "2026-11-13", "license": "SIL Open Font License 1.1", "attribution": "Copyright 2021 The Outfit Project Authors (https://github.com/Outfitio/Outfit-Fonts)", "modifications": "None. Full copyright and license notice retained verbatim.", "sha256": "c676351bf8576b9aba743cd5eaa8c0e7ee0d51f805d720447b4df4ddb6a2e416" }, { "id": "anton-woff2", "type": "font", "family": "Anton", "localPath": "public/assets/fonts/anton-regular.woff2", "originalUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/anton/Anton-Regular.ttf", "repository": "https://github.com/google/fonts/tree/main/ofl/anton", "repositoryBlobSha": "4d65707db9d8663ccfa99cd28cd3a4e0025be178", "author": "The Anton Project Authors", "institution": "Google Fonts official font repository", "date": "Not stated", "consulted": "2026-11-13", "license": "SIL Open Font License 1.1", "licenseUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/anton/OFL.txt", "localLicensePath": "public/assets/fonts/Anton-OFL.txt", "attribution": "Copyright 2020 The Anton Project Authors (https://github.com/googlefonts/AntonFont.git)", "modifications": "Converted the original TrueType font to WOFF2 using fontTools 4.68.0 and Brotli 1.2.1. No subsetting, glyph design, glyph ordering, character mapping, or horizontal metric changes. Original font names and copyright metadata retained.", "weightRange": { "minimum": 400, "maximum": 400, "default": 400 }, "binaryValidation": { "format": "WOFF2", "bytes": 57412, "sha256": "e261fbadf359b1387d3685b865818c2b7f650517e13016d77d21e1eb7ab7fae4", "glyphCount": 1373, "mappedCharacters": 978, "checks": "Reopened successfully; glyph order, character mapping, horizontal metrics, weight class, and variable axes match original TrueType." }, "sourceLocalPath": "public/assets/fonts/anton-regular.ttf" }, { "id": "outfit-woff2", "type": "font", "family": "Outfit", "localPath": "public/assets/fonts/outfit-variable.woff2", "originalUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/outfit/Outfit%5Bwght%5D.ttf", "repository": "https://github.com/google/fonts/tree/main/ofl/outfit", "repositoryBlobSha": "466d6245f9582df39bf73da91a8b3c938fd061cd", "author": "The Outfit Project Authors", "institution": "Google Fonts official font repository", "date": "Not stated", "consulted": "2026-11-13", "license": "SIL Open Font License 1.1", "licenseUrl": "https://raw.githubusercontent.com/google/fonts/main/ofl/outfit/OFL.txt", "localLicensePath": "public/assets/fonts/Outfit-OFL.txt", "attribution": "Copyright 2021 The Outfit Project Authors (https://github.com/Outfitio/Outfit-Fonts)", "modifications": "Converted the original TrueType font to WOFF2 using fontTools 4.68.0 and Brotli 1.2.1. No subsetting, glyph design, glyph ordering, character mapping, or horizontal metric changes. Original font names and copyright metadata retained.", "weightRange": { "minimum": 100, "maximum": 900, "default": 100 }, "binaryValidation": { "format": "WOFF2", "bytes": 45100, "sha256": "ed629d88c2db8ace1b3ac85fbf1fe0223d7272defaa817d1955100101966f0fb", "glyphCount": 416, "mappedCharacters": 360, "checks": "Reopened successfully; glyph order, character mapping, horizontal metrics, weight class, and variable axes match original TrueType." }, "sourceLocalPath": "public/assets/fonts/outfit-variable.ttf" } ] }