implementation of Atom Publishing Protocol

 The Atom Publishing Protocol (Atompub) is a protocol for publishing and
 editing Web resources described at http://www.ietf.org/rfc/rfc5023.txt.
 .
 Atompub implements client Atompub::Client and server Atompub::Server
 for the protocol. XML formats used in the protocol are implemented in
 XML::Atom and XML::Atom::Service. Catalyst extension
 Catalyst::Controller::Atompub is also available.