{
  "metadata": {
    "source": "ddc",
    "language": "en",
    "created_at": "2026-01-20",
    "total_count": 100,
    "description": "Dewey Decimal Classification knowledge domains (10 main classes + 90 divisions)"
  },
  "domains": [
    {"code": "000", "name": "Computer Science, Information & General Works", "level": "class", "parent": null},
    {"code": "010", "name": "Bibliographies", "level": "division", "parent": "000"},
    {"code": "020", "name": "Library & Information Sciences", "level": "division", "parent": "000"},
    {"code": "030", "name": "Encyclopedias & Books of Facts", "level": "division", "parent": "000"},
    {"code": "040", "name": "Unassigned", "level": "division", "parent": "000"},
    {"code": "050", "name": "Magazines, Journals & Serials", "level": "division", "parent": "000"},
    {"code": "060", "name": "Associations, Organizations & Museums", "level": "division", "parent": "000"},
    {"code": "070", "name": "News Media, Journalism & Publishing", "level": "division", "parent": "000"},
    {"code": "080", "name": "Quotations", "level": "division", "parent": "000"},
    {"code": "090", "name": "Manuscripts & Rare Books", "level": "division", "parent": "000"},

    {"code": "100", "name": "Philosophy & Psychology", "level": "class", "parent": null},
    {"code": "110", "name": "Metaphysics", "level": "division", "parent": "100"},
    {"code": "120", "name": "Epistemology", "level": "division", "parent": "100"},
    {"code": "130", "name": "Parapsychology & Occultism", "level": "division", "parent": "100"},
    {"code": "140", "name": "Philosophical Schools of Thought", "level": "division", "parent": "100"},
    {"code": "150", "name": "Psychology", "level": "division", "parent": "100"},
    {"code": "160", "name": "Logic", "level": "division", "parent": "100"},
    {"code": "170", "name": "Ethics", "level": "division", "parent": "100"},
    {"code": "180", "name": "Ancient, Medieval & Eastern Philosophy", "level": "division", "parent": "100"},
    {"code": "190", "name": "Modern Western Philosophy", "level": "division", "parent": "100"},

    {"code": "200", "name": "Religion", "level": "class", "parent": null},
    {"code": "210", "name": "Philosophy & Theory of Religion", "level": "division", "parent": "200"},
    {"code": "220", "name": "Bible", "level": "division", "parent": "200"},
    {"code": "230", "name": "Christianity & Christian Theology", "level": "division", "parent": "200"},
    {"code": "240", "name": "Christian Practice & Observance", "level": "division", "parent": "200"},
    {"code": "250", "name": "Christian Orders & Local Churches", "level": "division", "parent": "200"},
    {"code": "260", "name": "Christian Social & Ecclesiastical Theology", "level": "division", "parent": "200"},
    {"code": "270", "name": "History of Christianity", "level": "division", "parent": "200"},
    {"code": "280", "name": "Christian Denominations", "level": "division", "parent": "200"},
    {"code": "290", "name": "Other Religions", "level": "division", "parent": "200"},

    {"code": "300", "name": "Social Sciences", "level": "class", "parent": null},
    {"code": "310", "name": "Statistics", "level": "division", "parent": "300"},
    {"code": "320", "name": "Political Science", "level": "division", "parent": "300"},
    {"code": "330", "name": "Economics", "level": "division", "parent": "300"},
    {"code": "340", "name": "Law", "level": "division", "parent": "300"},
    {"code": "350", "name": "Public Administration & Military Science", "level": "division", "parent": "300"},
    {"code": "360", "name": "Social Problems & Services", "level": "division", "parent": "300"},
    {"code": "370", "name": "Education", "level": "division", "parent": "300"},
    {"code": "380", "name": "Commerce, Communications & Transportation", "level": "division", "parent": "300"},
    {"code": "390", "name": "Customs, Etiquette & Folklore", "level": "division", "parent": "300"},

    {"code": "400", "name": "Language", "level": "class", "parent": null},
    {"code": "410", "name": "Linguistics", "level": "division", "parent": "400"},
    {"code": "420", "name": "English & Old English Languages", "level": "division", "parent": "400"},
    {"code": "430", "name": "German & Related Languages", "level": "division", "parent": "400"},
    {"code": "440", "name": "French & Related Languages", "level": "division", "parent": "400"},
    {"code": "450", "name": "Italian, Romanian & Related Languages", "level": "division", "parent": "400"},
    {"code": "460", "name": "Spanish, Portuguese & Galician", "level": "division", "parent": "400"},
    {"code": "470", "name": "Latin & Italic Languages", "level": "division", "parent": "400"},
    {"code": "480", "name": "Classical & Modern Greek Languages", "level": "division", "parent": "400"},
    {"code": "490", "name": "Other Languages", "level": "division", "parent": "400"},

    {"code": "500", "name": "Science", "level": "class", "parent": null},
    {"code": "510", "name": "Mathematics", "level": "division", "parent": "500"},
    {"code": "520", "name": "Astronomy", "level": "division", "parent": "500"},
    {"code": "530", "name": "Physics", "level": "division", "parent": "500"},
    {"code": "540", "name": "Chemistry", "level": "division", "parent": "500"},
    {"code": "550", "name": "Earth Sciences & Geology", "level": "division", "parent": "500"},
    {"code": "560", "name": "Paleontology", "level": "division", "parent": "500"},
    {"code": "570", "name": "Biology & Life Sciences", "level": "division", "parent": "500"},
    {"code": "580", "name": "Botany", "level": "division", "parent": "500"},
    {"code": "590", "name": "Zoology", "level": "division", "parent": "500"},

    {"code": "600", "name": "Technology", "level": "class", "parent": null},
    {"code": "610", "name": "Medicine & Health", "level": "division", "parent": "600"},
    {"code": "620", "name": "Engineering", "level": "division", "parent": "600"},
    {"code": "630", "name": "Agriculture", "level": "division", "parent": "600"},
    {"code": "640", "name": "Home & Family Management", "level": "division", "parent": "600"},
    {"code": "650", "name": "Management & Public Relations", "level": "division", "parent": "600"},
    {"code": "660", "name": "Chemical Engineering", "level": "division", "parent": "600"},
    {"code": "670", "name": "Manufacturing", "level": "division", "parent": "600"},
    {"code": "680", "name": "Manufacture for Specific Uses", "level": "division", "parent": "600"},
    {"code": "690", "name": "Construction & Building", "level": "division", "parent": "600"},

    {"code": "700", "name": "Arts & Recreation", "level": "class", "parent": null},
    {"code": "710", "name": "Landscape & Area Planning", "level": "division", "parent": "700"},
    {"code": "720", "name": "Architecture", "level": "division", "parent": "700"},
    {"code": "730", "name": "Sculpture, Ceramics & Metalwork", "level": "division", "parent": "700"},
    {"code": "740", "name": "Drawing & Decorative Arts", "level": "division", "parent": "700"},
    {"code": "750", "name": "Painting", "level": "division", "parent": "700"},
    {"code": "760", "name": "Graphic Arts & Printmaking", "level": "division", "parent": "700"},
    {"code": "770", "name": "Photography & Computer Art", "level": "division", "parent": "700"},
    {"code": "780", "name": "Music", "level": "division", "parent": "700"},
    {"code": "790", "name": "Sports, Games & Entertainment", "level": "division", "parent": "700"},

    {"code": "800", "name": "Literature", "level": "class", "parent": null},
    {"code": "810", "name": "American Literature in English", "level": "division", "parent": "800"},
    {"code": "820", "name": "English & Old English Literature", "level": "division", "parent": "800"},
    {"code": "830", "name": "German & Related Literature", "level": "division", "parent": "800"},
    {"code": "840", "name": "French & Related Literature", "level": "division", "parent": "800"},
    {"code": "850", "name": "Italian, Romanian & Related Literature", "level": "division", "parent": "800"},
    {"code": "860", "name": "Spanish, Portuguese & Galician Literature", "level": "division", "parent": "800"},
    {"code": "870", "name": "Latin & Italic Literature", "level": "division", "parent": "800"},
    {"code": "880", "name": "Classical & Modern Greek Literature", "level": "division", "parent": "800"},
    {"code": "890", "name": "Other Literatures", "level": "division", "parent": "800"},

    {"code": "900", "name": "History & Geography", "level": "class", "parent": null},
    {"code": "910", "name": "Geography & Travel", "level": "division", "parent": "900"},
    {"code": "920", "name": "Biography & Genealogy", "level": "division", "parent": "900"},
    {"code": "930", "name": "History of Ancient World", "level": "division", "parent": "900"},
    {"code": "940", "name": "History of Europe", "level": "division", "parent": "900"},
    {"code": "950", "name": "History of Asia", "level": "division", "parent": "900"},
    {"code": "960", "name": "History of Africa", "level": "division", "parent": "900"},
    {"code": "970", "name": "History of North America", "level": "division", "parent": "900"},
    {"code": "980", "name": "History of South America", "level": "division", "parent": "900"},
    {"code": "990", "name": "History of Other Areas", "level": "division", "parent": "900"}
  ]
}