prov:label not in PROV namespace

[Joe-Heffer-Shef]

I'm trying to use rdflib.namespace.PROV.label but this PROV attribute isn't in rdflib.namespace.PROV:
https://www.w3.org/TR/prov-dm/#term-attribute-label

Traceback (most recent call last):
  File "C:\Users\cs1jsth\AppData\Local\Continuum\anaconda3\envs\airbods\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Users\cs1jsth\AppData\Local\Continuum\anaconda3\envs\airbods\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\cs1jsth\airbods\airbods\__main__.py", line 93, in <module>
    main()
  File "C:\Users\cs1jsth\airbods\airbods\__main__.py", line 81, in main
    rdflib.namespace.PROV.label: 'air readings 01',
  File "C:\Users\cs1jsth\AppData\Local\Continuum\anaconda3\envs\airbods\lib\site-packages\rdflib\namespace.py", line 188, in __getattr__
    raise AttributeError(e)
AttributeError: "term 'label' not in namespace 'http://www.w3.org/ns/prov#'"

[aucampia]

I had a look and there are quite a lot of terms missing from PROV:

diff <(python -c 'from rdflib.namespace import PROV; print("\n".join(dir(PROV)))' | sort | uniq) <(rdfpipe -o nt http://www.w3.org/ns/prov | sed -E -e 's,<http://www.w3.org/ns/prov#([^>]+)>,\n__term:\1\n,g' | sed -n 's/^__term://gp' | sort | uniq)
0a1
> Accept
4a6
> activityOfInfluence
7a10
> agentOfInfluence
8a12,13
> aq
> asInBundle
13a19
> category
15a22,30
> component
> constraints
> Contribute
> contributed
> Contributor
> Copyright
> Create
> Creator
> definition
17a33,41
> derivedByInsertionFrom
> derivedByRemovalFrom
> describesService
> dictionary
> Dictionary
> DirectQueryService
> dm
> editorialNote
> editorsDefinition
18a43
> EmptyDictionary
19a45
> ended
23a50,51
> entityOfInfluence
> generalizationOf
24a53
> generatedAsDerivation
27a57,59
> hadDelegate
> hadDerivation
> hadDictionaryMember
28a61
> hadInfluence
31a65
> hadRevision
33a68,70
> has_anchor
> has_provenance
> has_query_service
36a74,76
> informed
> insertedKeyEntityPair
> Insertion
40a81,82
> inverse
> KeyEntityPair
41a84,88
> locationOf
> mentionOf
> Modify
> n
> order
42a90,91
> pairEntity
> pairKey
43a93
> pingback
45a96,98
> provenanceUriTemplate
> Publish
> Publisher
46a100
> qualifiedAssociationOf
47a102
> qualifiedAttributionOf
48a104
> qualifiedCommunicationOf
49a106
> qualifiedDelegationOf
50a108
> qualifiedDerivationOf
51a110,111
> qualifiedEndOf
> qualifiedForm
52a113
> qualifiedGenerationOf
53a115,116
> qualifiedInfluenceOf
> qualifiedInsertion
54a118
> qualifiedInvalidationOf
56a121,122
> qualifiedQuotationOf
> qualifiedRemoval
57a124
> qualifiedSourceOf
58a126
> qualifiedStartOf
59a128
> qualifiedUsingActivity
60a130,134
> quotedAs
> Removal
> removedKey
> Replace
> revisedEntity
61a136,137
> RightsAssignment
> RightsHolder
62a139,140
> ServiceDescription
> sharesDefinitionWith
65a144
> started
66a146,148
> Submit
> todo
> unqualifiedForm
69a152
> wasActivityOfInfluence
70a154
> wasAssociateFor
77a162,164
> wasMemberOf
> wasPlanOf
> wasPrimarySourceOf
79a167
> wasRoleIn
80a169,170
> wasUsedBy
> wasUsedInDerivation

[aucampia]

Not sure what the best option is here, I guess I can just add them all by hand, but it would be nice to verify the namespaces maybe. I would like to add some tests for it, but then I would either have to fetch the vocabularies online or check them in.

There are some tests that do seem to fetch rdf files from web, so I will try to do that in a PR.

[aucampia]

Actually, while there may be some missing terms, prov:label is not is not among them as prov:label is not defined in the provenance ontology, and this seems to be somewhat intentional, see The PROV Namespace.

I suspect that prov:label should be represented with with rdfs:label because http://www.w3.org/ns/prov.ttl contains:

rdfs:label rdfs:isDefinedBy <http://www.w3.org/ns/prov-o#> .

I raised this question on the public-prov-comments mailing list.

[aucampia]

I made a new issue for the potentially missing terms: #1308

There is however no prov:label in RDF as far as I can tell so I think this issue should be closed @Joe-Heffer-Shef

[stain]

https://www.w3.org/ns/prov#label (in HTML) defines prov:label for PROV-XML, PROV-N and PROV-DM.

But in https://www.w3.org/TR/prov-o/#description-starting-point-terms we say:

The properties rdf:type and rdfs:label are used to express prov:type and prov:label, respectively.

..which explains why they are not in the PROV-O mapping in RDF resolutions like https://www.w3.org/ns/prov.ttl etc.

[stain]

BTW, if you are in Python you may try prov.py which can generate PROV in RDF and many others - it should hopefully take care of PROV.label vs rdfs.label although I have not tested that.

[nicholascar]

The mixed status of terms in the PROV namespace really does cause headaches for tool and system implementer...

Us RDFlib maintainers run a script to transform terms from the PROV ontology into a DefinedNamespace that then assists RDFlib users with term prompting (in IDEs) and validation but we struggle when there are random terms in the various supporting PROV documents (e.g. PROV-AQ) that are not in the ontology or any other PROV-based RDF document.