{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://rig.works/schemas/rig.book.publication.schema.json",
  "title": "rig.book.publication",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "publisher": {
      "$ref": "./_defs.schema.json#/$defs/entity"
    },
    "publishedDate": {
      "type": "string",
      "pattern": "^[0-9]{4}(-[0-9]{2}(-[0-9]{2})?)?$",
      "description": "ISO 8601 date or year (ONIX PublishingDate)."
    },
    "language": {
      "type": "string",
      "pattern": "^[a-z]{2,3}$",
      "description": "ISO 639-1 or 639-2/T (ONIX Language)."
    },
    "pageCount": {
      "$ref": "./_defs.schema.json#/$defs/uint"
    },
    "productForm": {
      "type": "string",
      "enum": [
        "hardcover",
        "paperback",
        "ebook",
        "audiobook",
        "other"
      ]
    },
    "cityOfPublication": {
      "$ref": "./_defs.schema.json#/$defs/string"
    },
    "copyrightYear": {
      "type": "integer",
      "minimum": 1000,
      "maximum": 9999
    }
  },
  "description": "Publishing detail. Field meanings follow ONIX PublishingDetail. Publisher is an organisation entity.",
  "minProperties": 1
}