output text/xml skipNullOn="elements"
output application/xml writeNilOnNull=true
---
a: {
  "a" @(attr1: null, attr2: "val", attr3: null): { "a": null, "b": true, "c": { "d" @(attr1: null, attr2: "val", attr3: null): false, "e": null} },
  "d": null,
  "e": "text"
}