This code implements relying party support for the Yadis service discovery
protocol. The protocol was developed for use by decentralized URL-based
identity systems, but is useful for advertising services provided by or on
behalf of a certain URL.
To learn more about Yadis, see http://www.openidenabled.com/yadis
The module yadis.xrires also provides a method of resolving XRI.
The JanRain Python OpenID library uses this library for discovery of OpenID
service endpoints. See that library for an example of library usage.