PREFIX ex: <http://schema.example/>
PREFIX sx: <http://www.w3.org/ns/shex#>

[] a sx:Schema ;
    sx:shapes (ex:IssueShape) .

ex:IssueShape a sx:ShapeDecl ; sx:shapeExpr [ a sx:Shape ;
    sx:expression [ a sx:TripleConstraint ;
            sx:predicate ex:state ;
            sx:valueExpr [ a sx:NodeConstraint ;
                    sx:nodeKind sx:iri ] ] ] .