Re: PROV-O in LOV : URI, namespace and versions

Timothy Lebo wrote:
> Hi, Bernard,
> 
> I'm cc'ing the prov comments list to archive your comments.
> 
> @PROV-WG, I might need help refreshing on our provenance-of-provenance design to
> fulfill Bernard's needs)
> @Ivan, we have a 404 on http://www.w3.org/ns/prov-o-20120312 but it needs to be
> there like http://www.w3.org/ns/prov-o-20130430 is)

Is there a misspelling somewhere? There is a

http://www.w3.org/ns/prov-o-20130312

(and not a 2012....)

Ivan


> @PROV-WG-chairs, are we still able to (or should we) use the tracker?
> 
> I respond within...
> 
> On Jun 17, 2013, at 9:32 AM, Bernard Vatant <bernard.vatant@mondeca.com
> <mailto:bernard.vatant@mondeca.com>> wrote:
> 
>> Hi Tim and Daniel
>>
>> I updated today the LOV record for PROV-O [1]. Actually this should have been
>> done well before, but the new version(s) had not been captured by the LOV-Bot,
>> due mainly to a confusing (for me and the LOV-Bot at least) namespaces and URI
>> policy.
>> I have several issues with this (important) vocabulary.
> 
> Thanks for reporting your challenges with consuming the PROV namespace. If PROV
> doesn't suit LOV, then it's a clear indicator that we aren't following common
> practice.
> I hope we can clear up the issues, either on your side or on ours.
> I've started a section on the semweb wiki to document your questions and their
> answers: http://www.w3.org/2001/sw/wiki/PROV-FAQ#The_PROV_URIs
> 
>>
>> As I write in the vocabulary "review" : " Note that the namespace of the
>> vocabulary is http://www.w3.org/ns/prov#, but its URI is
>> http://www.w3.org/ns/prov-o. But the RDF file declares
>> <http://www.w3.org/ns/prov#> a owl:Ontology, which seems confusing at least."
> 
> 
> yes, the namespace of the vocabulary is http://www.w3.org/ns/prov#
> 
> http://www.w3.org/ns/prov-o and http://www.w3.org/ns/prov are owl:Ontologies.
> 
> From the comment itself, I'm not sure what is confusing. Could you elaborate?
> (or, do the following three cover your concerns?)
> 
> 
>>
>> ... In more details :
>>
>> 1. The namespace http://www.w3.org/ns/prov# does not dereference to the
>> ontology, but to a general documentation page about various documents using
>> the namespace, including the ontology itself. 
> 
> Yes.
> 
>> How am I supposed to GET the RDF description of e.g.,
>> http://www.w3.org/ns/prov#Activity, from the namespace URI?
> 
> In short, use content negotiation.
> http://www.w3.org/2001/sw/wiki/PROV-FAQ#GET.27ing_an_RDF_description_of_a_PROV_term
> 
> curl -H "Accept: application/rdf+xml" -L http://www.w3.org/ns/prov
> 
> 
> 
>>
>> 2. In the RDF at http://www.w3.org/ns/prov-o I read 
>> <http://www.w3.org/ns/prov#> a owl:Ontology
>> one should expect  <http://www.w3.org/ns/prov-o> a owl:Ontology seems to me …
> 
> There are two instances of owl:Ontology, at lines:
> 
>   30 <http://www.w3.org/ns/prov#>
>   31     a owl:Ontology .
> 
> 1237 <http://www.w3.org/ns/prov-o#>
> 1238     a owl:Ontology ;
> 
> Could you explain why you would expect http://www.w3.org/ns/prov-o to be a
> owl:Ontology?
> 
> As it stands, http://www.w3.org/ns/prov-o provides the resource representation
> of the owl:Ontology http://www.w3.org/ns/prov-o# <http://www.w3.org/ns/prov-o#-o>
> 
> 
>>
>> 3. The previous versions (Candidate Recommandation and Proposed
>> Recommendation) are available as HTML documentation, but the respective RDF
>> versions are not available. 
> 
> 
> 
> 
> 
>> The link to the OWL version redirects to the current version.
> 
> Yes, to restate: http://www.w3.org/TR/2013/PR-prov-o-20130312/ points
> to http://www.w3.org/ns/prov-o in "The OWL encoding of the PROV Ontology is
> available here <http://www.w3.org/ns/prov-o>."?
> 
> The RDF representations for those versions are sitting around, so if you could
> describe in more detail how you'd like to be able to access them, perhaps we can
> update the provenance-of-provenance to 
> suit your use case.
> 
> From within http://www.w3.org/ns/prov-o,  the owl:versionIRI and
> prov:wasDerivedFrom are intended to provide access to the previous versions.
> But, I'm seeing a 404! :-)
> 
> 
> <http://www.w3.org/ns/prov-o#>
>     a owl:Ontology ;
>     rdfs:comment """This document is published by the Provenance Working Group
> (http://www.w3.org/2011/prov/wiki/Main_Page). 
> 
> If you wish to make comments regarding this document, please send them to
> public-prov-comments@w3.org <mailto:public-prov-comments@w3.org> (subscribe
> public-prov-comments-request@w3.org
> <mailto:public-prov-comments-request@w3.org>, archives
> http://lists.w3.org/Archives/Public/public-prov-c
> omments/). All feedback is welcome."""@en ;
>     rdfs:label "W3C PROVenance Interchange Ontology (PROV-O)"@en ;
>     rdfs:seeAlso <http://www.w3.org/TR/prov-o/>, <http://www.w3.org/ns/prov> ;
>     owl:versionIRI <http://www.w3.org/ns/prov-o-20130430> ;
>     owl:versionInfo "Recommendation version 2013-04-30"@en ;
>     :specializationOf <http://www.w3.org/ns/prov-o> ;
>     :wasRevisionOf <http://www.w3.org/ns/prov-o-20120312> .
> 
> 
> Thanks again for your comments. I hope that we can iron out some of the wrinkles
> that you ran into.
> 
> Regards,
> Tim Lebo
> 
> 
> 
>>
>> Thanks for any clarification. I understand that since we deal now with a W3C
>> Recommandation, if anything needs to be fixed, the process is likely to be long :)
>>
>> Best regards
>>
>>
>> [1] http://lov.okfn.org/dataset/lov/details/vocabulary_prov-o.html
>>
>>
>> *Bernard Vatant
>> *
>> Vocabularies & Data Engineering
>> Tel :  + 33 (0)9 71 48 84 59
>> Skype : bernard.vatant
>> Blog : the wheel and the hub <http://bvatant.blogspot.com/>
>> Linked Open Vocabularies : lov.okfn.org <http://lov.okfn.org/>
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>>
> 

-- 
Ivan Herman, W3C
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