{
  "@context": "http://www.w3.org/ns/shex.jsonld",
  "type": "Schema",
  "shapes": [
    { "type": "ShapeDecl",
    "id": "http://a.example/S1",
    "shapeExpr": {
      "type": "ShapeAnd",
      "shapeExprs": [
        {
          "type": "NodeConstraint",
          "nodeKind": "bnode"
        },
        {
          "type": "Shape"
        }
      ]
    } }
  ]
}