Canonical Text Services
The project also has a Sourceforge site, with more recent information: http://cts3.sourceforge.net/
There is a mailing list, too: https://lists.sourceforge.net/lists/listinfo/cts3-general
The Canonical (previously 'Classical') Text Services specification defines a network service for identifying texts and retrieving fragments of texts using notions of "work" and "citation" traditional in classical studies and other literary disciplines.
One classical project which uses Canonical Text Services is the Homer Multitext (cf. information on its blog).