Tools To Publish Dereferencable Linked Data?

Paul, (guessing your email address)

In 

http://answers.semanticweb.com/questions/15037/tools-to-publish-dereferencable-linked-data
(to which you have to sign up to reply)
you ask whether the result of looking up  X  in a linked data system should 

CONSTRUCT {X ?p ?o } WHERE {
    X ?p ?o .
}

I'd like to point out that the direction of a predicate is arbitrary -
an ontology can have parent or child, no time is spent worrying
about which, as the direction of RDF arrows has no fundamental meaning.

So it follows that you will also  want 
CONSTRUCT {?s ?p X } WHERE {
    ?s ?p X.
}
and the tracing of bnodes from there.

Tim