An Example - A Query in the RDF World

Hypothetical Search (in RDQL):
For each of the space platforms listed as active at DLR, list their name
and the sensor classes aboard according to the NASA source list.

SELECT ?z, ?y
FROM <http://nasa.gov/sources.rdf>, <http://dlr.de/active.rdf>
WHERE (?x, <sensor:class>, ?z),(?x,<platform:name>,?y)
USING
sensor for <http://ansi.gov/standards/1234>,
platform for <http://din.de/din1921>,
rdf for <http://www.w3.org/...>