- From: Knowledge Graph Construction Community Group Issue Tracker <sysbot+tracker@w3.org>
- Date: Thu, 25 Jul 2019 08:30:30 +0000
- To: public-kg-construct@w3.org
kg-construct-ISSUE-3: multiple values returned from a reference https://www.w3.org/community/kg-construct/track/issues/3 Raised by: Anastasia Dimou On product: Vladimir questions if are carml:multiReference and carml:multiTemplate which are proposed by Pano Maria needed or rml:reference and r:template suffice? Anastasia thinks that the RML specification should not restrict the number of values that are returned for a certain rml:reference or a reference included in rr:template. This comes as a consequence of including other formats. R2RML refers to tables in relational databases. Thus, it is normal to expect that one value would be returned for a certain reference (rr:column). However, RML works with other formats, including eg XML. There, an XPath expression might be validated over multiple elements and, thus, multiple values are returned. RML needs to support these cases by generating multiple RDF terms, one for each returned value.
Received on Thursday, 25 July 2019 08:30:46 UTC