4Suite is a Python-based toolkit for XML and RDF
application development.

It features a library of integrated tools for XML processing,
implementing open technologies such as DOM, RDF, XSLT, XInclude,
XPointer, XLink, XPath, XUpdate, RELAX NG, and XML/SGML Catalogs.
Layered upon this is an XML and RDF data repository and server,
which supports multiple methods of data access, query, indexing,
transformation, rich linking, and rule processing, and provides
the data infrastructure of a full database system, including
transactions, concurrency, access control, and management tools.
It also supports HTTP, SOAP, RPC, and FTP, plus APIs in
Python and XSLT.