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Re: Datatyping

From: Patrick Stickler <patrick.stickler@nokia.com>
Date: Wed, 25 Sep 2002 14:14:39 +0300
Message-ID: <00b701c26484$bd881cf0$d74416ac@NOE.Nokia.com>
To: <mbatsis@netsmart.gr>, <seth@robustai.net>, <www-rdf-comments@w3.org>

Thanks for the pointers, Manos.

This is similar to some stuff I've been playing around with, c.f.

http://www-nrc.nokia.com/sw/RDFL.html

I think that there is a definite need for one or more
standardized schemas that captures this information for
RDF applications, particularly once RDF datatyping is
finalized.

Though, fortunately, the RDF datatyping solution will be datatyping
framework neutral, so it does not need to capture the specifics
of XML Schema datatypes or their relations in its core machinery,
even though that information will be useful to applications dealing
with knowledge expressed using those datatypes.

I'd be very happy to collaborate further on this.

Cheers,

Patrick

[Patrick Stickler, Nokia/Finland, (+358 40) 801 9690, patrick.stickler@nokia.com]


----- Original Message ----- 
From: "ext m batsis" <mbatsis@netsmart.gr>
To: <seth@robustai.net>; <www-rdf-comments@w3.org>
Sent: 24 September, 2002 16:05
Subject: Re: Datatyping


> 
> 
> The list may also be interested in my attempt to import the W3C XML 
> Schema datatypes into RDF using RDFS. Our purpose is to base measurment 
> concepts on top of this in the future. The RDFS document may be found at 
> [1].
> 
> In short, I have imported the simple type hierarchy by declaring 
> xs:anySimpleType as a subclass of rdfs:Literal.
> 
> That way, one may use XML Schema simple types as literals, but actually 
> be aware of the type and it's relationship to the rest of XML Schema's 
> simple types.
> 
> Feedback on this attempt would be highly appreciated.
> 
> [1] 
> http://lists.oasis-open.org/archives/humanmarkup-comment/200209/bin00000.bin
> 
> Please change extension from .bin to .rdf.
> 
> Kindest regards,
> 
> Manos
> 
> 
> 
> Seth Russell wrote:
> > 
> > Since the WG apparently will be putting thinking caps back on regarding 
> > datatyping, I though I'd show the way I'd like the new datatyping to work:
> > 
> > I submit the graph:
> > http://robustai.net/mentography/jennyAge10.gif
> > which hopefully is consistent, yet includes the dreaded situations.
> > 
> > In this graph, note the following::
> > 
> > 1) There are two kinds of literal nodes:  TypedLiteral(s) and 
> > LexicalNodes.  2) TypedLiteral Nodes can be subjects.
> > 3) LexicalNodes cannot be subjects - as in M&S.
> > 4) TypedLiteral Nodes gain their semantics from the triples in the 
> > graphs (not node labels).
> > 5) All nodes in that graph are tidy - there are no Bnodes in that graph.
> > 6) Identity is defined on all nodes.
> > 7) Equality is defined on LiteralNodes but not on LexicalNodes.
> > 
> > In that graph, Jenny's age is not identical to John's age, yet I would 
> > like the MT to entail that equality.
> > In that graph, John's age is identical to the title of movie B, yet I 
> > would like the MT to entail that John's age is not equal the title of 
> > movie B. 
> > That graph is over on the Public-CMaps server, so anyone who is running 
> > that fine graphing tool provide by UWF [1], is welcome to add to , 
> > and\or correct it. The project is SemanticWeb and the name of the graph 
> > is jennyAge10.
> > 
> > [1] http://cmap.coginst.uwf.edu/
> > 
> > Seth Russell
> > http://radio.weblogs.com/0113759/
> > 
> > 
> > 
> 
> 
Received on Wednesday, 25 September 2002 07:16:40 GMT

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