{
  "name": "RDF Graph",
  "description": "Structure documentation for an RDF graph in the RDF/JSON serialization. An RDF graph is a set of triples organized as a map of subjects to predicate-object arrays.",
  "format": "Map<IRI, Map<IRI, Array<ObjectValue>>>",
  "patternKey": "Subject IRI or blank node identifier",
  "patternValue": {
    "description": "A map from predicate IRIs to arrays of object values for this subject.",
    "patternKey": "Predicate IRI",
    "patternValue": {
      "type": "array",
      "description": "Array of RDF object values.",
      "items": {
        "name": "ObjectValue",
        "fields": [
          {
            "name": "type",
            "type": "string (enum: uri, literal, bnode)",
            "required": true,
            "description": "The RDF term type: uri for IRI references, literal for typed/language values, bnode for blank nodes."
          },
          {
            "name": "value",
            "type": "string",
            "required": true,
            "description": "The value: an IRI string, lexical literal form, or blank node identifier."
          },
          {
            "name": "lang",
            "type": "string",
            "required": false,
            "description": "BCP47 language tag, present only for language-tagged literals."
          },
          {
            "name": "datatype",
            "type": "string (uri)",
            "required": false,
            "description": "Datatype IRI for typed literals. Defaults to xsd:string."
          }
        ]
      }
    }
  }
}