The package provides an implementation of a parser for documents matching the XML 1.0 and XML Namespace Recommendations. In addition to parsing commands are provided to attach TeX typesetting instructions to the various markup elements as they are encountered. Sample files for typesetting a subset of TEI, MathML, are included. Element and Attribute names, as well as character data, may use any characters allowed in XML, using UTF-8 or a suitable 8-bit encoding.