* [AP_VOID_STAT,EXT] Use threads for calculating VoID stats.
* [JSON_TO_RDF,SC] Cleanup of rdf_global_id/2 predicate usage.
* [JSON_TO_RDF,EXT] Use of new XSD value assertion predicate.
* [VOID_DB,EXT] Also look at VoID descriptions that can be deduced.
* [XSD,NEW] Added xsd_compare/4.
* [XSD_CLEAN,EXT] Finalized the rewrite.
* [XSD_DATETIME,XSD_DURATION,EXT] Just fail upon being incomparable.