- From: Brian McBride <bwm@hplb.hpl.hp.com>
- Date: Tue, 09 Oct 2001 11:34:42 +0100
- To: Graham Klyne <GK@NineByNine.org>
- CC: RDF core WG <w3c-rdfcore-wg@w3.org>
There seem to be no responses to Graham's proposed resolution text, and I assume therefore no dissent. This will be on Friday's telecon agenda. Brian Graham Klyne wrote: > With respect to the issue: > [1] http://www.w3.org/2000/03/rdf-tracking/#rdfms-identity-anon-resources > > Being a revision of my previous message: > [2] http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2001Aug/0030.html > > And citing the model theory document: > [3] http://www.w3.org/TR/2001/WD-rdf-mt-20010925/ > > I propose the following resolution text: > > [[[ > 1. Resources that are described but not named in an XML serialization > (by rdf:ID or rdf:about) are represented in an RDF abstract graph by > nodes that do not have any associated URI. Such nodes, called bNodes > (from blank nodes) are thereby distinguishable from other described > resource nodes, which do have an associated URI-reference label. > > To directly address the question of the issue: a so-called anonymous > resource has no URI. > > 2. To reflect un-named descriptions in N-triples, local names must be > introduced (i.e. of the form '_:name'). These names are not URIs, and > their scope is the N-triples document in which they appear. > > 3. In normal use, the meaning of bNode is to assert the existence of at > least one resource which is the subject and/or object of properties as > indicated by the graph. This is covered more formally by the Model > Theory [3], section 2. See also the anonymity lemmas in section 3.2. > > NOTE: it has been proposed that the RDF graph syntax can be used for > form a query, in which bNodes may be interpreted as query variables. > This resolution confirms that bNodes can be distinguished from other > labelled nodes within the graph syntax, but is silent about if and how > the graph syntax might be used to represent a query. > ]]] > > #g > > > ------------ > Graham Klyne > (GK@ACM.ORG) >
Received on Tuesday, 9 October 2001 06:39:15 UTC