Hi,

Is it possible to reference from SPARQL query to named graphs persisted
in database use named graphs persisted in database?

***

If it is not clear I'll give you an example based on "Restricting
Possible Graph IRIs" feature described at:
http://128.30.52.31/TR/rdf-sparql-query/#specDataset

Please consider that all models with personal profile data are stored in
database. Then, as in the given example I would like to find all friends
of Alice (and she is pointed by her e-mail address), which are described
in specific graph.

In the given example it is assumed that Jena somehow knows that graphs
with specific IRIs are stored somewhere in persisted storage and IRIs
are being found during query execution. If this is a problem for Jena I
could assume that this IRI is static during query execution.

Is it clear?
Is it possible to handle with?

Regards,
Maciej