The GAVO data center at Zentrum für Astronomie Heidelberg provides VO publication services to all interested parties on behalf of the German Astrophysical Virtual Observatory. It's a A growing collection of data and services.
GAVO is a Member of the International Virtual Observatory Alliance. The data center contains about 100 different services, most of which are accessible through the various VO protocols (SIAP, SSAP, SCS, TAP, SLAP). The citation guidelines above are just examples; they change from service to service.
GAVO Data Center is covered by Thomson Reuters Data Citation Index.