4. The computer-implemented method of claim 1 where the storing of triples in the source table is performed by mapping triple component identifiers associated with triples in the set of triples to a set of compact identifiers that require less storage space than a triple component identifier in the set of triples that requires the most storage space and storing the compact identifiers in the data source.
4. The computer-implemented method of claim 1 where the storing of triples in the source table is performed by mapping triple component identifiers associated with triples in the set of triples to a set of compact identifiers that require less storage space than a triple component identifier in the set of triples that requires the most storage space and storing the compact identifiers in the data source. 5. The computer-implemented method of claim 4 where the mapping is performed by sequentially mapping the triple component identifiers to a compact identifier comprising a unique integer value.