This system was a (non-fully compliant) XSLT-based implementation of GRDDL (first presented to the RDF in XHTML Task Force on November 24, 2003, and substantially updated since).
It has been superseded by a more robust GRDDL service.
There is also a more generic demonstration which works on any XML format, once enabled with GRDDL.
See also the GRDDL HowTo.
This demonstration is based on an XSLT style sheet.
The compliance of this service to the GRDDL specification is limited by lack of error handling in XSLT 1.0 and limitations of the XSLT service it relies on ; it should give in most cases the expected results on input that does not generate errors.