{
  "format": "Parquet",
  "semantics": {
    "datatype": "Datatype IRI when present on a literal",
    "language": "BCP 47 language tag when present on a literal",
    "object": "Decoded IRI, blank-node identifier, or literal lexical value",
    "object_kind": "One of iri, literal, or blank_node",
    "predicate": "Decoded predicate IRI",
    "record_id": "Stable collection and source-line identifier within this snapshot",
    "source_line": "One-based line number in the decompressed official dump",
    "subject": "Decoded N-Triples subject IRI or blank-node identifier"
  },
  "tables": {
    "authorities": [
      {
        "name": "record_id",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "subject",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "predicate",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "object",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "object_kind",
        "nullable": true,
        "type": "dictionary<values=string, indices=int8, ordered=0>"
      },
      {
        "name": "language",
        "nullable": true,
        "type": "dictionary<values=string, indices=int16, ordered=0>"
      },
      {
        "name": "datatype",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "collection",
        "nullable": true,
        "type": "dictionary<values=string, indices=int8, ordered=0>"
      },
      {
        "name": "source_line",
        "nullable": true,
        "type": "uint64"
      },
      {
        "name": "snapshot_date",
        "nullable": true,
        "type": "date32[day]"
      }
    ],
    "bibliographic": [
      {
        "name": "record_id",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "subject",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "predicate",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "object",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "object_kind",
        "nullable": true,
        "type": "dictionary<values=string, indices=int8, ordered=0>"
      },
      {
        "name": "language",
        "nullable": true,
        "type": "dictionary<values=string, indices=int16, ordered=0>"
      },
      {
        "name": "datatype",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "collection",
        "nullable": true,
        "type": "dictionary<values=string, indices=int8, ordered=0>"
      },
      {
        "name": "source_line",
        "nullable": true,
        "type": "uint64"
      },
      {
        "name": "snapshot_date",
        "nullable": true,
        "type": "date32[day]"
      }
    ],
    "subjects": [
      {
        "name": "record_id",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "subject",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "predicate",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "object",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "object_kind",
        "nullable": true,
        "type": "dictionary<values=string, indices=int8, ordered=0>"
      },
      {
        "name": "language",
        "nullable": true,
        "type": "dictionary<values=string, indices=int16, ordered=0>"
      },
      {
        "name": "datatype",
        "nullable": true,
        "type": "string"
      },
      {
        "name": "collection",
        "nullable": true,
        "type": "dictionary<values=string, indices=int8, ordered=0>"
      },
      {
        "name": "source_line",
        "nullable": true,
        "type": "uint64"
      },
      {
        "name": "snapshot_date",
        "nullable": true,
        "type": "date32[day]"
      }
    ]
  }
}