W3C home > Mailing lists > Public > public-openannotation@w3.org > November 2012

Re: F2F Decision: Provenance

From: Graham Klyne <graham.klyne@zoo.ox.ac.uk>
Date: Thu, 01 Nov 2012 22:54:14 +0000
Message-ID: <5092FD96.5080506@zoo.ox.ac.uk>
To: public-openannotation@w3.org
Hi all,

I may be coming late to this party.  Sorry if I grab the wrong end of the stick 
here.  I'm a participant in the prov group, but here am speaking strictly for 
myself - other members of the group may disagree.


prov:alternativeOf isn't quite the same as "equivalence", though it's possible 
that it's similar to ao:equivalent.  I don't know if ao:equivalent means more or 
less than one might expect of "equivalent".

My interpetation of prov:alternativeOf is roughtly

a prov:specializationOf c
b prov:specializationOf c
a prov:alternativeOf v


a prov:specializationOf c means that the resource a is resource c constrained to 
some interval or context or situation.

E.g. (Boston in 1776) prov:specializationOf (Boston)

Following this, we might have

(Boston in 1776) prov:alternativeOf (Boston in 2012)

Are they equivalent?  I'd say not.  But do they in some sense refer to the same 
thing?  I'd say so.

If that kind of semantics works for AO, then fine, but I'm suspecting it may be 
somewhat different to what you might expect.  It's not, for example, like the 
old rdf:Alternate class.


As far as I'm aware, there is no prov:generatedAt property.  Do you mean 
prov:generartedAtTime?  (http://www.w3.org/TR/prov-o/#generatedAtTime)


On 01/11/2012 10:39, Antoine Isaac wrote:
> Hi all,
> I guess the lack of reaction means everyone agrees :-)
> I may have trouble the very idea of representing oa:Annotation as direct result
> of the generating, as opposed to the direct result of annotating. But I'll
> clearly need some more time to get my head around it.
> One trivial for now is replacing oa:generator with oa:generatedBy.
> This makes the property seem very close to prov:wasGeneratedBy, in a context
> where OA and PROV would be used together. While they are quite different in
> reality: range of oa:generatedBy would be agent, range of prov:wasGeneratedBy is
> prov:Activity.
> Antoine
>> This part of the discussion covered two primary topics related to
>> provenance and the W3C Provenance Ontology.
>> 1.  Can we replace oa:equivalent with something from the Prov work?
>> Decision:  Yes, prov:alternateOf is semantically identical to oa:equivalent
>> Thus we'll simply replace all mentions of oa:equivalent in the
>> specification with prov:alternateOf
>> 2.  What is the relationship between the current (simple) provenance
>> information recorded for an annotation, and the Prov work?
>> Decisions:
>>   - Replace oa:generated with prov:generatedAt, as they are
>> semantically identical
>>   - Replace oa:generator with oa:generatedBy, and subclass of
>> prov:wasAttributedTo
>>   - Replace oa:annotated with oa:annotatedAt (to follow the generatedAt pattern)
>>   - Replace oa:annotator with oa:annotatedBy
>>   - Include a diagram of the mapping in the specification
>> (Diagram attached)
>> Thanks,
>> Rob&  Paolo
Received on Thursday, 1 November 2012 22:58:10 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 20:22:02 UTC