[spec] Pull Request: requirement non recursive shapeExprRef

iovka has just submitted a new pull request for https://github.com/shexSpec/spec:

== requirement non recursive shapeExprRef ==
I've added a subsection that explains that a shape label cannot refer to itself through shapeExprRef.

See https://github.com/shexSpec/spec/pull/19

Received on Thursday, 15 March 2018 10:43:59 UTC