Versa is a language for addressing and querying an RDF
model, allowing traversal of arcs, processing of node
contents, and general expression evaluation. Uche Ogbuji
recently announced updates to both the Versa draft specification and Versa-by-example tutorial.
Ogbuji describes Versa as "a sort of a break-off from RIL
(RDF Inference Language) in a similar way
that XPath broke off from XSLT". All queries demonstrated in
the Versa-by-example tutorial are apparently supported in the
current development version of 4Suite (see the 4Suite download
page for information about checking out the current
4Suite development code via anonymous CVS). Ogbuji says he'd
like to see the Versa spec developed through a community
process and eventually implemented in other RDF systems.