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core + bib (Bibliographic Extension): terms relating to books and bibliography.

identifier

Canonical URL: http://schema.org/identifier

Thing > Property > identifier

The identifier property represents any kind of identifier for any kind of Thing, such as ISBNs, GTIN codes, UUIDs etc. Schema.org provides dedicated properties for representing many of these, either as textual strings or as URL (URI) links. See background notes for more details.

Usage: Between 1000 and 10,000 domains
Values expected to be one of these types
PropertyValue
Text
URL
Used on these types
Thing
Sub-properties
accountId
confirmationNumber
duns
flightNumber
globalLocationNumber
gtin12
gtin13
gtin14
gtin8
isbn
issn
legislationIdentifier
leiCode
orderNumber
productID
serialNumber
sku
taxID

Schema Version 3.3