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Re: Datatypes

From: Bijan Parsia <bparsia@cs.man.ac.uk>
Date: Thu, 23 Aug 2007 13:53:35 +0100
Message-Id: <35410A3B-5ED9-4770-BE6B-DBF7A7C3ACFA@cs.man.ac.uk>
Cc: semantic-web@w3.org
To: Dave Reynolds <der@hplb.hpl.hp.com>

On 23 Aug 2007, at 13:33, Dave Reynolds wrote:

> Bijan Parsia wrote:
>> On 23 Aug 2007, at 09:54, Dave Reynolds wrote:
>>> Bijan Parsia wrote:
>> [snipped useful stuff]
>>>> That's nice. We should have a list somewhere (heck, for all I  
>>>> know, pellet's support is derived in part from Jena!).
>>>> Does Jena also support the OWL 1.1 RDF vocabulary for defining  
>>>> datatypes? (Not that I'm convinced that this is, in general, a  
>>>> good idea).
>>>
>>> No, at least not yet. We're not yet convinced that such  
>>> replication of XSD inside OWL is appropriate, though can see some  
>>> benefits.
>> [snip]
>> Hmm. That's more than I can see, personally. The main benefits  
>> seems to be free use of datatype expressions (versus having to  
>> name them) and perhaps the "one file" thang. The latter is rather  
>> uninteresting to me.
>
> Yes, you are right. I must have been feeling too mellow when  
> writing that message ;-) I think our original feedback was more  
> robustly negative.
>
> The all-in-one-file is one argument and as you say is hardly exciting.

Yeah, we should just ignore it, I think.

> There is possibly an argument for being able to query the structure  
> of the data expression without having to move to a different tool  
> stack but I couldn't make such an argument convincingly myself.

The strong use case is the need for anonymous datatype expressions.  
I've been in situations where I would have to coin a lot of pointless  
datatype names (e.g., to represent events occurring within certain  
intervales).

>> For the former, I'd tend to prefer using fragments of XML Schema  
>> (although that has it's own problems).
>
> Reasonable.

No pretty solution, really. Maybe relax-ng has some better way.

Cheers,
Bijan.
Received on Thursday, 23 August 2007 12:52:15 GMT

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