- From: RDB2RDF Working Group Issue Tracker <sysbot+tracker@w3.org>
- Date: Wed, 18 May 2011 04:36:22 +0000
- To: public-rdb2rdf-wg@w3.org
ISSUE-42 (null handling direct mapping): How is the direct mapping suppose to handle NULL values wrt Information Preserving [Direct Mapping] http://www.w3.org/2001/sw/rdb2rdf/track/issues/42 Raised by: Juan Sequeda On product: Direct Mapping Currently, the direct mapping completely ignores NULL values. In other words, no triples are generated for NULL values. This seems to be the expected output. However there seems to an issue when it comes to Information Preserving. If the direct mapping considers the schema, then there is no need to translate NULLs in order for the mapping to be information preserving. However, if the schema is not considered, the mapping is not information preserving. Currently, the direct mapping does not consider the schema. For an example, please see: http://lists.w3.org/Archives/Public/public-rdb2rdf-wg/2011May/0049.html
Received on Wednesday, 18 May 2011 04:36:23 UTC