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Re: One comment on RDF mapping [related to ISSUE 67 and ISSUE 81]

From: Alan Wu <alan.wu@oracle.com>
Date: Thu, 12 Jun 2008 21:56:11 -0400
Message-ID: <4851D3BB.4000506@oracle.com>
To: Alan Ruttenberg <alanruttenberg@gmail.com>
CC: Boris Motik <boris.motik@comlab.ox.ac.uk>, OWL Working Group WG <public-owl-wg@w3.org>

Alan,

Sorry for the delay.

What if the annotation itself is "There is an unnannotated version of 
this axiom"

Thanks,

Zhe

Alan Ruttenberg wrote:
> Can this not be resolved without compromising monotonicity? 
>
> Assume we always serialize the s p o.
>
> In the case of an axiom that has no annotation we proceed as documented.
> In the case where we have only an axiom with annotation we proceed as 
> documented, except that we add the s p o triple)
> In the case where there are both we add an annotation that says: 
> "There is an unnannotated version of this axiom". 
>
> -Alan
>
>
> On Jun 11, 2008, at 11:42 AM, Alan Wu wrote:
>
>>> One concern of mine was the reverse mapping of axioms: if you find 
>>> both the nonreified and the reified and annotated axiom, you
>>>
>>> don't know what the original ontology was. Well, here is a possible 
>>> way to handle this:
>>>
>>> 1. We modify the forward mapping such that, if an ontology O 
>>> contains both a nonannotated axiom ax and an annotated axiom ax', 
>>> then we serialize the following:
>>>
>>>
>>> (a) the nonreified version of ax
>>>
>>> (b) the reified version of both ax and ax'
>>>
>>> 2. We modify the backward mapping such that, if an RDF graph 
>>> contains both a nonreified version of the axiom ax and a reified 
>>> version ax', then only ax' is kept.
>>>
>>>
>>> In this way, the axiom generated in (a) can be used for the 
>>> semantics. The axioms generated in (b), however, would reflect the 
>>> actual structure of the ontology.
>>>
>>>
>>> A slight problem might be that the reverse mapping is nonmonotonic. 
>>> I could live with that; however, I don't know whether other people can.
>>>
>>> Regards,
>>>
>
Received on Friday, 13 June 2008 01:58:58 GMT

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