Looking for documents that use DocBook API markup

[Paul DuBois <paul@kitebird.com>]

I need to mark up some API information that includes classes, methods,
functions, and so forth.  It would be helpful to be able to look at
some "prior art".  Can anyone point me to some DocBook source that
uses elements such as <classsynopsis>, <methodsynopsis>, <ooclass>,
<funcsynopsis>, etc.?  Thanks.