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RDF Issue

From: Brian McBride <bwm@hplb.hpl.hp.com>
Date: Mon, 19 Nov 2001 15:36:04 +0000
Message-Id: <>
To: conen@wi-inf.uni-essen.de
Cc: www-rdf-comments@w3.org



you raised an issue which was captured in




[Equivalence]: There are four RDF model "flavours" (formal/data model, 
graph(ical) model, serialization syntax, triple). To what extend 
(precisely) are these models (not) equivalent? (Problems related to 
anonymity have been discussed, see also below, details need to be 
summarized). Could trying to find transformation grammars be a solution 
(preciseness, determination of equivalence)? Shouldn't this be in a 
"formal" part of M&S spec?


As recorded in


the RDFCore WG decided on the following:

o The WG agrees that:

        - the graph model which is the basis for the model theory
        - the n-Triples representation of an RDF graph
        - the diagrams of graphs used in documents such as the RDF Model
          and Syntax document

       are currently all equivalent

    o The WG resolves to maintain that equivalence (noting that this is a 
statement of intent rather than a certified fact).

    o The WG notes that the RDF/XML syntax as currently defined is unable
      to represent an arbritary RDF graph.  In particular, the RDF/XML syntax
      cannot fully represent a bNode which is the object of more than one

    o The WG believes that extending the RDF/XML syntax so that it can 
respresent      all RDF graphs is beyond the scope of its current charter 
and resolves to postpone consideration of this issue.

    o The WG actions the editor of the RDF Syntax WD to include in that 
document a clear statement of the RDF graph structures that RDF/XML is 
unable to represent.


Please could you respond to this message, copying www-rdf-comments@w3.org 
indicating whether this is an acceptable resolution of this issue.

Brian McBride
RDFCore co-chair
Received on Monday, 19 November 2001 10:36:23 UTC

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