{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/taylors/main/json-schema/taylors-item-schema.json",
  "title": "Koha Item",
  "description": "A catalog item record from the Taylor's Library Koha REST API.",
  "type": "object",
  "additionalProperties": false,
  "required": ["biblio_id"],
  "properties": {
    "item_id": { "type": "integer", "description": "Internal item identifier" },
    "biblio_id": { "type": "integer", "description": "Internal identifier for the parent bibliographic record" },
    "external_id": { "type": ["string", "null"], "maxLength": 20, "description": "The item's barcode" },
    "callnumber": { "type": ["string", "null"], "maxLength": 255, "description": "Call number for this item" },
    "home_library_id": { "type": ["string", "null"], "maxLength": 10, "description": "Library the item belongs to" },
    "holding_library_id": { "type": ["string", "null"], "maxLength": 10, "description": "Library currently in possession of the item" },
    "item_type_id": { "type": ["string", "null"], "maxLength": 10, "description": "Itemtype defining the type for this item" },
    "collection_code": { "type": ["string", "null"], "maxLength": 80, "description": "Authorized value for the collection code" },
    "location": { "type": ["string", "null"], "maxLength": 80, "description": "Authorized value for the shelving location" },
    "permanent_location": { "type": ["string", "null"], "maxLength": 80, "description": "The permanent shelving location" },
    "copy_number": { "type": ["string", "null"], "maxLength": 32, "description": "Copy number" },
    "inventory_number": { "type": ["string", "null"], "maxLength": 80, "description": "Inventory number" },
    "acquisition_date": { "type": ["string", "null"], "format": "date", "description": "The date the item was acquired" },
    "replacement_price": { "type": ["number", "null"], "description": "Cost to replace the item" },
    "purchase_price": { "type": ["number", "null"], "description": "Purchase price" },
    "public_notes": { "type": ["string", "null"], "description": "Public notes on this item" },
    "internal_notes": { "type": ["string", "null"], "description": "Non-public notes on this item" },
    "checkouts_count": { "type": ["integer", "null"], "description": "Number of times this item has been checked out" },
    "holds_count": { "type": ["integer", "null"], "description": "Number of times this item has been placed on hold" },
    "renewals_count": { "type": ["integer", "null"], "description": "Number of times this item has been renewed" },
    "not_for_loan_status": { "type": "integer", "description": "Authorized value defining why this item is not for loan" },
    "last_seen_date": { "type": ["string", "null"], "format": "date-time", "description": "The date the item barcode was last scanned" },
    "uri": { "type": ["string", "null"], "description": "URL for the item" },
    "timestamp": { "type": "string", "format": "date-time", "description": "Date and time this item was last altered" }
  }
}