- From: Roland Schwaenzl <Roland.Schwaenzl@mathematik.Uni-Osnabrueck.DE>
- Date: Mon, 21 Jan 2002 12:42:04 +0100 (MET)
- To: barstow@mediaone.net, sandro@w3.org
- Cc: www-rdf-interest@w3.org
> > > The following defect report against the W3C's ARP-based RDF Validator: > > > > [1] http://lists.w3.org/Archives/Public/www-rdf-validator/2002Jan/0304.html > > > > suggests a violation of the following part of M&S: > > > > [[ > > When a resource represents a reified statement; that is, it has an > > RDF:type property with a value of RDF:Statement, then that resource > > must have exactly one RDF:subject property, one RDF:object property, > > and one RDF:predicate property. > > ]] > > > > Since this defect report appears to be accurate and all of the online RDF > > parsers (ARP, SWI, CARA, Profium, Raptor, RDFStore) listed at: > > > > [2] http://www.w3.org/People/Barstow/#online_parsers > > > > seem to have this defect, if you are responsible for a parser listed > > at [2], you may want to review [1]. > The cited sentence seems with a bit difficult grammar. For CARA we assumed the sentence from the viewpoint of a parser has to be interpreted in combination with RDF M&S sec6. The view is also supported by RDF M&S sec4.1. It asserts "All reified statements are instances of RDF:Statement". It does not say "are THE instances of RDF:Statement". In effect this results in: A resource of type "Statement" represents a reified statement if and only if it has exactly one subject,object,predicate property. In case the class "Statement" is supposed to contain exactly the representatives of reified statements RDF M&S sec 4.1, sec6 should be clarified in this respect. Best, rs
Received on Monday, 21 January 2002 06:42:14 UTC