{
  "schema_version": "1.0",
  "schema_url": "https://thecodex.expert/energy/api/v1/schema",
  "codex": {
    "name": "The Energy Codex",
    "url": "https://thecodex.expert/energy/",
    "domain": "energy",
    "llms_txt": "https://thecodex.expert/energy/llms.txt"
  },
  "entry": {
    "id": "fuel/hydrogen",
    "status": "active",
    "url_html": "https://thecodex.expert/energy/fuel/hydrogen/",
    "url_json": "https://thecodex.expert/energy/api/v1/entries/fuel/hydrogen/index.json",
    "url_markdown": "https://thecodex.expert/energy/fuel/hydrogen/index.md",
    "url_changelog": "https://thecodex.expert/energy/fuel/hydrogen/changelog.json",
    "name": "Hydrogen",
    "type": "concept",
    "aliases": [
      "hydrogen energy",
      "green hydrogen",
      "blue hydrogen",
      "H2"
    ],
    "category": {
      "id": "fuels",
      "name": "Fuels"
    },
    "subcategory": {
      "id": "hydrogen",
      "name": "Hydrogen"
    },
    "definition": {
      "canonical": "142 MJ/kg, highest energy density per kg of any fuel. Green/blue/grey types. SMR process. India National Green Hydrogen Mission 5MT/2030. Source: IEA Future of Hydrogen 2023.",
      "summary": "142 MJ/kg, highest energy density per kg of any fuel. Green/blue/grey types. SMR process. India National Green Hydrogen Mission 5MT/2030. Source: IEA ...",
      "is_contested": false,
      "contested_positions": []
    },
    "relationships": {
      "broader": [],
      "narrower": [],
      "related": [],
      "contrast": [],
      "requires": [],
      "used_with": []
    },
    "provenance": {
      "author": "The Codex (Let Us Do It For U)",
      "author_url": "https://thecodex.expert",
      "reviewer": null,
      "created": "2026-05-03",
      "last_updated": "2026-05-03",
      "last_reviewed": "2026-05-03",
      "version": "1.0",
      "confidence": "high",
      "confidence_note": "High \u2014 sourced from named Tier-1 institutions (IEA, IRENA, IPCC AR6, BP, IAEA PRIS), verified 2026-05-03.",
      "citation": "\"Hydrogen\", The Energy Codex, https://thecodex.expert/energy/fuel/hydrogen/, last updated 2026-05-03."
    }
  }
}