ISSUE-168: How to constrain number of instances of a class in a graph

instance count

How to constrain number of instances of a class in a graph

State:

CLOSED

Product:

SHACL - Core

Raised by:

Holger Knublauch

Opened on:

2016-06-13

Description:

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 ;
] .

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Related emails:

1. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-23)
2. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from holger@topquadrant.com on 2016-06-23)
3. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from holger@topquadrant.com on 2016-06-23)
4. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from pfpschneider@gmail.com on 2016-06-22)
5. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from lehors@us.ibm.com on 2016-06-22)
6. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from irene@topquadrant.com on 2016-06-22)
7. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-22)
8. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from irene@topquadrant.com on 2016-06-22)
9. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-22)
10. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from holger@topquadrant.com on 2016-06-22)
11. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-21)
12. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-18)
13. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from holger@topquadrant.com on 2016-06-18)
14. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from irene@topquadrant.com on 2016-06-17)
15. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from irene@topquadrant.com on 2016-06-17)
16. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-17)
17. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from irene@topquadrant.com on 2016-06-17)
18. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-17)
19. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from holger@topquadrant.com on 2016-06-17)
20. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kontokostas@informatik.uni-leipzig.de on 2016-06-14)
21. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from holger@topquadrant.com on 2016-06-14)
22. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from holger@topquadrant.com on 2016-06-14)
23. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kontokostas@informatik.uni-leipzig.de on 2016-06-13)
24. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from irene@topquadrant.com on 2016-06-13)
25. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-13)
26. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from kcoyle@kcoyle.net on 2016-06-13)
27. Re: shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from irene@topquadrant.com on 2016-06-13)
28. shapes-ISSUE-168 (instance count): How to constrain number of instances of a class in a graph [SHACL - Core] (from sysbot+tracker@w3.org on 2016-06-13)

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