set-dtd [--internal] [--name|:n expression] [--public|:p expression] [--system|:s expression] [document]

set_dtd

Set external (default) or internal DTD for a given document. If no document is given, the current document is used. At least one of --public and --system options should be used to specify the PUBLIC and SYSTEM identifiers of the DTD. If --name parameter is not provided, name of the document root element is used as DTD name.

dtd, validate