{
  "@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": "NodeConstraint",
          "values": [
            {
              "type": "LiteralStemRange",
              "stem": {
                "type": "Wildcard"
              },
              "exclusions": [
                {
                  "type": "LiteralStem",
                  "stem": "v1"
                },
                {
                  "type": "LiteralStem",
                  "stem": "v2"
                },
                {
                  "type": "LiteralStem",
                  "stem": "v3"
                }
              ]
            }
          ]
        }
      }
    } }
  ]
}