{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://rig.works/schemas/rig.art.subject.schema.json",
  "title": "rig.art.subject",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "work": {
      "$ref": "./_defs.schema.json#/$defs/entity"
    },
    "heading": {
      "$ref": "./_defs.schema.json#/$defs/string"
    },
    "interpretation": {
      "$ref": "./_defs.schema.json#/$defs/string"
    }
  },
  "required": [
    "work"
  ],
  "description": "Subject matter. Field meanings follow CDWA Subject Matter. A second heading is another entity.",
  "minProperties": 2
}