{
  "schemaVersion": 1,
  "observedAt": "2026-08-01",
  "required": [
    "id",
    "title or structured_title",
    "description or structured_description",
    "link",
    "image_link",
    "availability",
    "price"
  ],
  "optionalSyntaxChecked": [
    "availability_date",
    "condition",
    "gtin"
  ],
  "excluded": [
    "category-dependent attributes",
    "shipping",
    "tax",
    "account settings",
    "website consistency",
    "policy",
    "identifier truth"
  ]
}