- From: RDF Data Shapes Working Group Issue Tracker <sysbot+tracker@w3.org>
- Date: Mon, 13 Jun 2016 12:04:22 +0000
- To: public-data-shapes-wg@w3.org
shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core]
http://www.w3.org/2014/data-shapes/track/issues/168
Raised by: Holger Knublauch
On product: SHACL - Core
There was recent discussion about how to specify min/max numbers of instances in a graph. Off-list I had also received a question from schema.org people about how to state that a graph/message must have exactly one instance of schema:FlightReservation, possibly to ensure that a graph has a starting point/root for validation.
A possible syntax that would easily work with the current architecture could be
ex:MyShape
a sh:Shape ;
sh:scopeNode schema:FlightReservation ;
sh:constraint [
sh:minInstanceCount 1 ;
sh:maxInstanceCount 1 ;
] .
Received on Monday, 13 June 2016 12:04:24 UTC