How do I use SPARUL to change a selection of property values from URI References to Literals? Assume a given graph where triples are comprised of property values that are mixed across URI References and Typed Literals as exemplified by the results of the query below:SELECT DISTINCT ?sa ?oa FROM <http://ucb.com/nbeabase> WHERE { ?sa a <http://ucb.com/nbeabase/resource/Batch> . ?sa <http://ucb.com/nbeabase/resource/chemAbsNo> ?oa . FILTER regex(?oa, '-','i') } You can use the following SPARUL pattern to harmonize the property values across relevant triples in a specific graph, as shown below: SQL> SPARQL INSERT INTO GRAPH <http://ucb.com/nbeabase> { ?sa <http://ucb.com/nbeabase/resource/sampleId> `str (?oa)` } WHERE { ?sa <http://ucb.com/nbeabase/resource/chemAbsNo> ?oa . FILTER regex(?oa, '-','i') } Related Virtuoso Tips and Tricks Collection RDF Data Access and Data Management