Re: RDF* vs RDF vs named graphs

I certainly agree with Thomas that examples used throughout the RDF* documents
and discussions are ill-supported by the various formal definitions underlying
RDF*.

We see

:bob foaf:name "Bob" .
<<:bob foaf:age 23>>
  dct:creator <http://example.com/crawlers#c1> ;
  dct:source <http://example.net/listing.html> .

in http://ceur-ws.org/Vol-1912/paper12.pdf

<<:painting :height 32.1>>
  :unit :cm;
  :measurementTechnique :laserScanning;
  :measuredOn "2020-02-11"^^xsd:date.

<<:man :hasSpouse :woman>>
  :source :TheNationalEnquirer;
  :webpage <http://nationalenquirer.com/news/2020-02-12>;
  :retrieved "2020-02-13"^^xsd:dateTime.

in https://graphdb.ontotext.com/documentation/9.2/free/devhub/rdf-sparql-star.html

<<:Bess_Schrader :employedBy :Enterprise_Knowledge . >> :dateAdded "2020-05-22" .
<<:Bess_Schrader :employedBy :Enterprise_Knowledge . >> :addedBy :user_bscrader .

in https://enterprise-knowledge.com/rdf-what-is-it-and-why-do-i-need-it/

<<?c a rdfs:Class>> dct:source ?src ;
    prov:wasDerivedFrom <<?c a owl:Class>> .

:loisLane :believes << :superman :can :fly >>.

in https://w3c.github.io/rdf-star/rdf-star-cg-spec.html



What should be concluded from this?  Just about the most charitable conclusion
is that RDF* is unsuitable for its claimed use.

So what is RDF* good for?  I am concerned about this.


peter

Received on Wednesday, 2 December 2020 23:47:23 UTC