{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "5.2-pageNextValidated.json",
  "assertionType": "must",
  "expectedResult": "valid",
  "onUnexpectedResult" : "failAndContinue",
  "errorMessage": "ERROR: Annotation Page has an invalid next value.",
  "title": "True when **Annotation Page has no _next_ key** or has **_next_ key** with valid value of string of format uri - [model 5.2](https://www.w3.org/TR/annotation-model/#annotation-page)",
  "oneOf": [
      { "allOf": [
           { "$ref": "collections.json#/definitions/nextValidIfPresent" },
           { "$ref": "collections.json#/definitions/annotationPageTypeValueFound"  }
         ]
      },
      { "type": "object",
        "properties":
         {"first":
           { "$ref": "collections.json#/definitions/nextValidIfPresent" }
         },
        "required": [ "first" ]
      }
  ]
}