another problem with pre-binding

• From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
• Date: Fri, 10 Mar 2017 09:32:11 -0800
• To: "public-rdf-shapes@w3.org" <public-rdf-shapes@w3.org>
• Message-ID: <90d38ef8-d470-3ce4-878c-14a530ec93ec@gmail.com>

Here is another problem with pre-binding in SHACL.

Consider the following query

PREFIX ex: <http://example.org/>
SELECT $this WHERE {
 ?parent ex:type/ex:subClassOf* ex:Person .
 BIND ( ?parent AS $this )
 FILTER EXISTS { ?parent ex:child ?this . }
}

The evaluation of this legal query with this pre-bound to any RDF term
produces an undefined result.


Peter F. Patel-Schneider
Nuance Communications

Received on Friday, 10 March 2017 17:32:45 UTC