Example code: Querying the database
The most general query method is triples(), which takes a (subject, property, object) 3-tuple, returning an iterator over the matching triples. Each element of the tuple can contain a URIRef or Literal instance, or None to match anything.
For example, to list all things which have a dc:title property:
>>> DC_TITLE =
URIRef('http://purl.org/dc/elements/1.1/title')
>>> for s,p,o in store.triples((None, DC_TITLE,
None)):
... print s,p,o
...
urn:isbn:0609602330 http://purl.org/dc/elements/1.1/title
"Isaac's Storm".
urn:isbn:1930110111 http://purl.org/dc/elements/1.1/title "XSLT
Quickly".
>>>