{
  "@context": "http://www.w3.org/ns/shex.jsonld",
  "type": "Schema",
  "shapes": [
    { "type": "ShapeDecl",
    "id": "http://a.example/S1",
    "shapeExpr": {
      "type": "Shape",
      "expression": {
        "type": "TripleConstraint",
        "predicate": "http://a.example/p1",
        "valueExpr": {
          "type": "ShapeNot",
          "shapeExpr": {
            "type": "ShapeOr",
            "shapeExprs": [
              {
                "type": "NodeConstraint",
                "nodeKind": "literal"
              },
              {
                "type": "NodeConstraint",
                "values": [
                  "http://a.example/v1",
                  "http://a.example/v2"
                ]
              }
            ]
          }
        }
      }
    } }
  ]
}