The following words are used to read something into an XML document

read-xml ( stream -- xml )

read-xml-chunk ( stream -- seq )

string>xml ( string -- xml )

string>xml-chunk ( string -- xml )

file>xml ( filename -- xml )

bytes>xml ( byte-array -- xml )

To read a DTD:

read-dtd ( stream -- dtd )

file>dtd ( filename -- dtd )

string>dtd ( string -- dtd )