Developers can find excellent resources at productontology.org, home of The Product Types Ontology: High-precision identifiers for product types based on
Wikipedia. According to productontology.com, “GoodRelations is a standardized vocabulary (also known as ‘schema,’ ‘data dictionary,’ or ‘ontology’) for product, price, and company data that can (1) be embedded into existing static and dynamic Web pages and that (2) can be processed by other computers. This increases the visibility of your products and services in the latest generation of search engines, recommender systems, and other novel applications.” Kmart.com and Sears.com have recently joined the ranks of big retailers using GoodRelations and RDFa.

The webpage notes, “schema.org is an entry-level alternative for marking up pages for search engines. While the classes provided by this service are initially meant to complement GoodRelations and schema.org, they can be used for any other Semantic Web or Linked Open Data application as well.”

Learn more here.

Image: Courtesy GoodRelations