yadis.pl -- Yadis discovery

See also

- http://en.wikipedia.org/wiki/Yadis

 xrds_dom(+Id, -XRDS_DOM) is det

True when XRDS_DOM is a parsed XML document for the given resource.

 xrds_location(+Id, -XRDSLocation) is semidet

Discover the location of the XRDS document from the given Id.