The XHTML Document Type

The Extensible HyperText Markup Language (XHTML), is a markup language that has the same depth of expression as HTML, but also conforms to XML syntax.

A file is considered to be a XHTML document when the root element name is html.

Default schemas that are used if one is not detected in the XHTML file are stored in the following locations:
The default catalogs for the XHTML document type are as follows:
Parent topic: Predefined Document Types (Frameworks) Previous topic: DITA Map Templates Next topic: XHTML Transformation Scenarios