add ACM CCS to Skosmos

[VladimirAlexiev]

https://bartoc.org/en/node/475#access says that I can browse this vocab at
https://bartoc-skosmos.unibas.ch/CCS/, but that returns
404 Error: The page /CCS/ cannot be found.

Would it be possible to add this important thesaurus to Skosmos?
It's available in SKOS at https://dl.acm.org/pb-assets/dl_ccs/acm_ccs2012-1626988337597.xml (please add that link to the BARTOC record as well).

Thanks!

[VladimirAlexiev]

Also:

• https://bartoc.org/en/node/475#content "Search in vocabulary" doesn't work: eg if if type "numeric" (as in "numerical methods"), nothing is found.
• https://bartoc.org/en/node/475#identifiers: please add https://www.wikidata.org/wiki/Property:P2179

[nichtich]

Requires #186

[nichtich]

The ACM CCS file is no valid RDF/XML (it can simply be fixed by changing lang to xml:lang) and it defines no base URI. At http://data.phdhub.eu/ there is a better version but I've found no data dump yet (data could be queried via SPARQL nevertheless). Shall we take this version?

[nichtich]

So far I've found variants of ACM CCS at the following URI namespaces:

Namespace	Source	Year
http://oaff.info/ontology/acm-ccs#	https://lists.w3.org/Archives/Public/semantic-web/2011Jun/0018.html	2011
http://acm.rkbexplorer.com/ontologies/acm#	https://lov.linkeddata.es/dataset/lov/vocabs/acm	<=2011 (see archive.org)
https://vocabulary.semantic-web.com/acm/	https://vocabulary.semantic-web.com/acm/	~2018
http://data.phdhub.eu/resource/classifications/ccs/	http://data.phdhub.eu/page/classifications/ccs	?
none	https://dl.acm.org/pb-assets/dl_ccs/acm_ccs2012-1626988337597.xml	>=2012

There may be reasons to mint new URIs for new editions of ACM CCS but these were not the reasons that lead to that many SKOS representations of the same classification. In my opinion ACM is to blame for not minting official URIs.

[VladimirAlexiev]

emailed [email protected]:
You provide the ACM CCS as RDF at
https://dl.acm.org/pb-assets/dl_ccs/acm_ccs2012-1626988337597.xml .
But the file has 2 defects:
(major) It doesn't define a base, which means the URLs are not well defined
(minor) It uses attribute "lang" instead of "xml:lang", which makes it invalid
Please see #185 for more details
(and we'll appreciate very much if you comment/contribute there).

Why is it important to have ACM CCS with stable semantic (RDF) URLs:
So that people can refer to these semantic resources in their own data.
So the data can be loaded to https://skosmos.bartoc.org/, which is a thesaurus integration platform
Thanks in advance!

[VladimirAlexiev]

@nichtich thanks for the investigation! Emailed ACM, let's see.

I notice another difference:

• acm_ccs2012-1626988337597.xml uses hierarchical URLs like 10002944.10011122
• but eg PoolParty uses simple URLs like https://vocabulary.semantic-web.com/acm/10011122.html
• Should we ask ACM to use non-hierarchical (which I like better), or comply with their URLs?

More:

• I checked https://vocabulary.semantic-web.com/acm/ vs http://data.phdhub.eu/resource/classifications/ccs/, they have the same number of concepts. The 2012 edition is the latest, so I don't expect any differences.
• I'd say copy the PoolParty version into Skosmos
• please add https://dl.acm.org/pb-assets/dl_ccs/acm_ccs2012-1626988337597.xml as another source (dump)
• please add https://www.wikidata.org/wiki/Property:P2179 as "identifier"