The urn:org:netkernel:web:core module provides a core set of HTML/Web application services.
There are many additional XML processing services that may be installed including XSLT 2, XQuery, several schema language validators, SOAP message processing tools, RSS/Atom feed processing tools, E4X capability etc etc etc. Search for xml tools
The active:tagSoup accessor uses John Cowan's TagSoup library. Licensed under the Apache 2.0 license. Our grateful thanks John and all those that contributed to this project.