# Tag Library Support in the JSP Source Editor

WTP provides tools to the source editor for validating tag and attribute existence within a tag library along with providing content assist for those tags and attributes. The JSF tooling has provided support for tag libraries that goes beyond this.

Frameworks for the plugin developer/tag library provider have been created so that meta-data driven validation of the tag attribute values can be performed along with providing content assist. These frameworks are extensible and will provide additional services in the future.

Technically any JSP tag library can be supported, but in this release, only the JSF Standard tag libraries are supported. The support consists of:

- semantic validation of attribute values
- content assistance for attribute values

where the attribute values can be the JSF expression language, or not.

JSF Core Library
JSF HTML Library