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

model

Thing > Property > model

The model of the product. Use with the URL of a ProductModel or a textual representation of the model identifier. The URL of the ProductModel can be from an external source. It is recommended to additionally provide strong product identifiers via the gtin8/gtin13/gtin14 and mpn properties.

Usage: Between 50,000 and 100,000 domains
Values expected to be one of these types
ProductModel
Text
Used on these types
Product

Schema Version 3.1