Organization of Schemas

The schemas are a set of 'types', each associated with a set of properties. The types are arranged in a hierarchy.
The core vocabulary currently consists of 641 Types, 992 Properties, and 216 Enumeration values.

Browse the full hierarchy:
Or you can jump directly to a commonly used type:
Using the extension mechanism the core vocabulary is extended by the following hosted extensions:
See also the releases page for recent updates and project history.

We also have a small set of primitive data types for numbers, text, etc. More details about the data model, etc. are available here.