Definition of adopted FOAF concept causes OWL DL Profile violation in SOSA and SSN #41
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ajnelson-nist
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this issue
in casework/CASE-Corpora
Feb 13, 2023
This patch starts the adoption process of integrating the Semantic Sensor Network (SSN) ontology into CASE-Corpora's ontology and shapes. The initial application of SSN is in representing contents of a file being observed to change. Due to an issue with a definition conflict between FOAF, SSN, and SOSA, this initial patch sets up the generation record, but does not integrate SOSA and SSN into the build process yet. A follow-on patch will regenerate Make-managed files. References: * https://github.com/w3c/sdw/issues/1395 Signed-off-by: Alex Nelson <[email protected]>
ajnelson-nist
referenced
this issue
in casework/CASE-Corpora
Feb 13, 2023
With this patch, the dependencies directory passes 'make check' with sosa.ttl and ssn.ttl integrated. A follow-on patch will regenerate Make-managed files. References: * https://github.com/w3c/sdw/issues/1395 Signed-off-by: Alex Nelson <[email protected]>
dr-shorthair
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Hello,
Some concepts from the FOAF ontology are used to annotate the SOSA ontology - specifically, there is a blank node defining a
foaf:Agentwithfoaf:name "W3C/OGC Spatial Data on the Web Working Group"@en. This also applies to the SSN ontology.foaf:nameis defined in SOSA as anowl:AnnotationProperty. The FOAF ontology is not imported in SOSA. The defining statement is here today in SSN, here today in SOSA (links are to the last commits affecting those files, 2018-08-09).Unfortunately, the most recent version of the FOAF specification defines
foaf:nameas anowl:DatatypeProperty. ("Most recent" meaning the 2014 version. The FOAF page currently links to that release stored on the Internet Archive, due to apparent recovery from an event.) This causes a graph that imports both FOAF and SOSA to be inconsistent with the OWL 2 DL Profile; see OWL 2 Syntax, Section 5.8.1, "Typing Constraints of OWL 2 DL", especially the last bullet under "Property typing constraints".I haven't exhaustively reviewed other ontologies in this repository for the issue. I came across this issue due to work on a project involving DCAT and SSN, and found the issue using this SHACL shape on a graph incorporating SSN's and FOAF's transitive import closure.
Is it possible for this to be corrected for at least SOSA and SSN? I'm happy to supply a correcting PR, but am unsure of the policy on accepting contributions.
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