{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://edan.si.edu/openaccess/schemas/collection-item",
  "title": "Smithsonian Collection Item",
  "description": "A museum collection object from the Smithsonian Institution Open Access API",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique EDAN identifier"
    },
    "title": {
      "type": "string",
      "description": "Object title"
    },
    "unitCode": {
      "type": "string",
      "description": "Smithsonian museum or library unit code (e.g., NMAH, NASM, SIA)",
      "examples": ["NMAH", "NASM", "SIA", "NMNHAH", "FSG"]
    },
    "type": {
      "type": "string",
      "description": "EDAN record type",
      "enum": ["edanmdm", "ead_collection", "ead_component"]
    },
    "url": {
      "type": "string",
      "format": "uri",
      "description": "URL to the object page on si.edu"
    },
    "thumbnail": {
      "type": "string",
      "format": "uri",
      "description": "URL to thumbnail image"
    },
    "content": {
      "type": "object",
      "description": "Full metadata content",
      "properties": {
        "descriptiveNonRepeating": {
          "type": "object",
          "description": "Non-repeating descriptive metadata",
          "properties": {
            "title": {
              "type": "object",
              "properties": {
                "content": {"type": "string"}
              }
            },
            "record_ID": {"type": "string"},
            "unit_code": {"type": "string"},
            "data_source": {"type": "string"},
            "online_media": {
              "type": "object",
              "properties": {
                "media": {
                  "type": "array",
                  "items": {"$ref": "#/definitions/MediaItem"}
                }
              }
            }
          }
        },
        "indexedStructured": {
          "type": "object",
          "description": "Structured indexed metadata for faceted search",
          "properties": {
            "object_type": {"type": "array", "items": {"type": "string"}},
            "date": {"type": "array", "items": {"type": "string"}},
            "place": {"type": "array", "items": {"type": "string"}},
            "culture": {"type": "array", "items": {"type": "string"}},
            "topic": {"type": "array", "items": {"type": "string"}},
            "online_media_type": {"type": "array", "items": {"type": "string"}}
          }
        },
        "freetext": {
          "type": "object",
          "description": "Free-text metadata fields",
          "properties": {
            "physicalDescription": {"type": "array", "items": {"type": "object"}},
            "setName": {"type": "array", "items": {"type": "object"}},
            "creditLine": {"type": "array", "items": {"type": "object"}},
            "notes": {"type": "array", "items": {"type": "object"}},
            "identifier": {"type": "array", "items": {"type": "object"}}
          }
        }
      }
    }
  },
  "definitions": {
    "MediaItem": {
      "type": "object",
      "properties": {
        "thumbnail": {"type": "string", "format": "uri"},
        "idsId": {"type": "string"},
        "type": {
          "type": "string",
          "enum": ["Images", "Videos", "Audio", "3D Models"]
        },
        "content": {"type": "string", "format": "uri"},
        "caption": {"type": "string"}
      }
    }
  }
}