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

<http://schema.example/IssueShape> a sx:ShapeDecl ; sx:shapeExpr [ a sx:Shape;
   sx:expression [
     a sx:TripleConstraint;
     sx:predicate <http://schema.example/reproducedBy>;
     sx:valueExpr <http://schema.example/TesterShape>
   ] ] .

<http://schema.example/TesterShape> a sx:ShapeDecl ; sx:shapeExpr [ a sx:Shape;
   sx:expression [
     a sx:TripleConstraint;
     sx:predicate <http://schema.example/role>;
     sx:valueExpr [
       a sx:NodeConstraint;
       sx:values (<http://schema.example/testingRole>)
     ]
   ] ] .

[]
     a sx:Schema;
     sx:shapes (<http://schema.example/IssueShape> <http://schema.example/TesterShape>) .