| Interface for database identifiers.
Most RDF entities (resources, literals, statements) have an associated
database index. These are cached using RDB-specific variants of the jena
"impl" classes. This can avoid some redundant database lookup.
In simple implementations the database identifier is simply an integer
given a database row index allocated by some generator. In other implementations
we use a "unique" hash of the resource or literal data itself. This interface
encapsulates the different ID representations.
author:
Dave Reynolds
version:
$Revision: 1.7 $ on $Date: 2008/01/02 12:08:24 $ |