{
  "standard": "ONIX for Books",
  "release": "3.1",
  "revision": "3.1.2",
  "schema_version": "3.1.2.0",
  "schema_source": "onixcheck bundle of the official EDItEUR XSD",
  "schema_file": "ONIX_BookProduct_3.1_reference.xsd",
  "validation_schema_codelist_issue": 72,
  "metadata_codelist_issue": 74,
  "validated_at": "2026-08-29T18:58:21.6385942Z",
  "valid": true,
  "edition_level_model": true,
  "validation_methods": [
    "W3C XML Schema 1.0 via System.Xml",
    "edition-level business-rule checks"
  ],
  "product_records": 8,
  "represented_work_records": 6,
  "unique_record_references": 8,
  "proprietary_identifiers": 18,
  "isbn13_identifiers": 0,
  "product_forms": {
    "BC": 2,
    "ED": 6
  },
  "thema_subjects": 8,
  "front_cover_resources": 8,
  "manifestation_work_links": 8,
  "publication_dates": 3,
  "publishers": 8,
  "product_supply_blocks": 0,
  "pending_candidates": 4,
  "warnings": [
    "No ISBN-13 is emitted because none is confirmed for an exact edition.",
    "5 Product records omit publication date because an edition-level date is not confirmed.",
    "1 juvenile-audience Product records omit an exact age range because none is confirmed.",
    "No ProductSupply, price, market or sales-rights territory is asserted without rights-holder confirmation.",
    "4 candidate editions remain outside the feed pending verification."
  ],
  "errors": []
}