{
  "@context": "http://www.w3.org/ns/shex.jsonld",
  "type": "Schema",
  "shapes": [
   { "id": "http://schema.example/IssueShape",
     "type": "ShapeDecl",
     "shapeExpr": {
     "type": "Shape",
     "expression":
    { "type": "TripleConstraint",
      "predicate": "http://schema.example/related",
      "valueExpr": "http://schema.example/IssueShape",
      "min": 0, "max": -1
    } } } ] }