... Individual search results are fed into a catalogue cross-matcher developed by GAVO. ... The German Astrophysical Virtual Observatory (GAVO) is setting up an infrastructure that will allow (1) exercising the existing simple cone search (SCS) services; (2) searching for exotic objects like isolated neutron stars, brown and white dwarfs; and (3) constructing a multi-band spectral energy distribution (SED) from various catalogues, useful e.g. for source identification and classification purposes. ...