ISSUE-117: sh:class should not require that its objects be known to be instances of rdfs:Class

non-classes as classes

sh:class should not require that its objects be known to be instances of rdfs:Class

State:
CLOSED
Product:
SHACL - Core
Raised by:
Peter Patel-Schneider
Opened on:
2016-01-11
Description:
Currently the spec says:

The property sh:class can be used to verify that each value of the given property is an instance of a given type. The values of sh:class must be classes (instances of rdfs:Class).

In Holger's implementation this is checked in conjunction with the data graph, meaning that a SHACL shape's syntactic correctness depends on the data graph.

Instead, objects sh:class triples should not need to be instances of rdfs:Class. This means that the shape

[ rdf:type sh:Shape; sh:scopeClass pp:Person ;
sh:property [ rdf:type sh:PropertyConstraint;
sh:predicate pp:pet; sh:class pp:Pet; sh:minCount 1 ] ]

should be syntactically correct.
Related Actions Items:
No related actions
Related emails:
  1. Re: shapes-ISSUE-117 (non-classes as classes): sh:class should not require that its objects be known to be instances of rdfs:Class [SHACL - Core] (from holger@topquadrant.com on 2016-01-20)
  2. Re: shapes-ISSUE-117 (non-classes as classes): sh:class should not require that its objects be known to be instances of rdfs:Class [SHACL - Core] (from arthur.ryman@gmail.com on 2016-01-19)
  3. shapes-ISSUE-117 (non-classes as classes): sh:class should not require that its objects be known to be instances of rdfs:Class [SHACL - Core] (from sysbot+tracker@w3.org on 2016-01-11)

Related notes:

RESOLUTION: Close ISSUE-117, dropping from Section 3.1.1 sh:class the sentence "The values of sh:class must be classes (instances of rdfs:Class)." and any assertions that sh:predicate must be an rdfs:Property
See https://www.w3.org/2016/02/04-shapes-minutes.html#resolution03

Arnaud Le Hors, 5 Feb 2016, 23:56:31

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