Data type and attribute items identify data types (defined as subtypes) and attributes that are in addition to the Windchill modeled classes.

The data types available in a context are determined by the data types defined in the organization context, as well as those defined in the site context.

For example, if your organization context has defined Plan and Report document subtypes, then these subtypes are available in any project, program, product, or library context created from your organization context.