Reads the XML document pointed to by the URI specified by the arg-string and returns the document node in a node set. The URI can be relative to the URI of the including policy. If the URI or DN cannot be resolved to a well-formed XML document, the result is an empty node set.
<token-document> <arg-string> <token-text>../MyDriver#DirXML-DriverFilter</token-text> </arg-string></token-document>
( arg-string )