Re: rdf:List from Vassilis Christophides on 2002-08-07 (public-webont-comments@w3.org from August 2002)

From: Vassilis Christophides <christop@ics.forth.gr>
Date: Wed, 7 Aug 2002 15:19:09 +0300 (EEST)
To: pfps@research.bell-labs.com
CC: tolle@dbis.informatik.uni-frankfurt.de, public-webont-comments@w3.org
Message-Id: <200208071219.PAA15871@athena.ics.forth.gr>

Hi Peter and Jos

I am wondering whether the addition of rdf:List and
rdf:ParseType="Collection" in the RDFMS makes redundant previous
constructs like rdf:Seq and rdf:Alt. From formal viewpoint using lists
we can represent both Seqs and Alts.

I have two questions: 

a) What is the status of rdf:List as far rdfs is concerned? Is-it a
class (instances have a URI) or a structured value (instances without
a URI) ?

b) Why not go one step further in the RDFMS refinement and define also
types for list elements: e.g., list of integers, strings, URIs? Note
that this is of paramount importance for interpreting the results of
an rdf query returned as collections.

Vassilis Christophides

Received on Wednesday, 7 August 2002 08:24:56 UTC