{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "5.1-collectionLabelValidated.json",
  "assertionType": "must",
  "expectedResult": "valid",
  "onUnexpectedResult" : "failAndContinue",
  "errorMessage": "ERROR: Annotation Collection has label key with non-string value or an array as value containing non-string value.",
  "title": "**Annotation Collection _label_ key**, if present, is **a value of type string** - [model 5.1](https://www.w3.org/TR/annotation-model/#annotation-collection)",
  "$ref": "collections.json#/definitions/labelDefinition"
}