{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://api.springernature.com/schemas/publication",
  "title": "Springer Nature Publication Record",
  "description": "Metadata record for a Springer Nature scholarly publication (article, book chapter, or book)",
  "type": "object",
  "properties": {
    "identifier": {
      "type": "string",
      "description": "Unique record identifier"
    },
    "url": {
      "type": "array",
      "description": "Access URLs for different platforms and formats",
      "items": {
        "$ref": "#/definitions/ContentUrl"
      }
    },
    "title": {
      "type": "string",
      "description": "Full title of the publication"
    },
    "creators": {
      "type": "array",
      "description": "Authors and contributors",
      "items": {
        "$ref": "#/definitions/Creator"
      }
    },
    "publicationName": {
      "type": "string",
      "description": "Journal name, book series, or collection title"
    },
    "issn": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-9]{3}[0-9X]$",
      "description": "Print ISSN"
    },
    "eissn": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-9]{3}[0-9X]$",
      "description": "Electronic ISSN"
    },
    "isbn": {
      "type": "string",
      "description": "ISBN for books and book chapters"
    },
    "doi": {
      "type": "string",
      "description": "Digital Object Identifier",
      "pattern": "^10\\.[0-9]{4,}/.+"
    },
    "publisher": {
      "type": "string",
      "description": "Publishing organization"
    },
    "publicationDate": {
      "type": "string",
      "format": "date",
      "description": "Date of publication"
    },
    "onlineDate": {
      "type": "string",
      "format": "date",
      "description": "Date of online publication"
    },
    "printDate": {
      "type": "string",
      "format": "date",
      "description": "Date of print publication"
    },
    "volume": {
      "type": "string",
      "description": "Journal volume number"
    },
    "number": {
      "type": "string",
      "description": "Journal issue number"
    },
    "startingPage": {
      "type": "string",
      "description": "First page of the article"
    },
    "endingPage": {
      "type": "string",
      "description": "Last page of the article"
    },
    "copyright": {
      "type": "string",
      "description": "Copyright statement"
    },
    "contentType": {
      "type": "string",
      "enum": ["Article", "Book", "Chapter", "ReferenceWork", "ReferenceWorkEntry", "Protocol"],
      "description": "Type of scholarly content"
    },
    "abstract": {
      "type": "string",
      "description": "Abstract or summary of the publication"
    },
    "subjects": {
      "type": "array",
      "description": "Subject classification terms",
      "items": {
        "type": "string"
      }
    },
    "keyword": {
      "type": "array",
      "description": "Author-supplied keywords",
      "items": {
        "type": "string"
      }
    },
    "openAccess": {
      "type": "boolean",
      "description": "Whether the content is freely available under open access"
    },
    "license": {
      "type": "string",
      "description": "Open access license (e.g., CC BY 4.0)"
    }
  },
  "definitions": {
    "ContentUrl": {
      "type": "object",
      "properties": {
        "format": {
          "type": "string",
          "enum": ["html", "pdf", "epub"],
          "description": "Content format"
        },
        "platform": {
          "type": "string",
          "description": "Delivery platform name"
        },
        "value": {
          "type": "string",
          "format": "uri",
          "description": "URL to the content"
        }
      }
    },
    "Creator": {
      "type": "object",
      "properties": {
        "creator": {
          "type": "string",
          "description": "Author name in Last, First format"
        },
        "ORCID": {
          "type": "string",
          "pattern": "^[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{3}[0-9X]$",
          "description": "ORCID persistent author identifier"
        },
        "affiliation": {
          "type": "string",
          "description": "Institutional affiliation"
        }
      }
    }
  }
}