{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "id": "3.3.7-targCanonicalValidated.json",
    "assertionType": "must",
    "expectedResult": "valid",
    "onUnexpectedResult" : "failAndContinue",
    "errorMessage": "ERROR: A target or target/source has multiple canonical key values for a target or source, or a single canonical key value that is not of format uri.",
    "title": "If present all target-level or target/source-level **_canonical_ keys** have a **single value** which is a string of **format uri** - [model 3.3.](https://www.w3.org/TR/annotation-model/#other-identities)",
    "description": "True when no target-level or target/source-level (SR target) canonical key present or when all canonical keys have a single value which is a string of format uri (Section 3.3.7)",
    "type": "object",
    "properties":
    {
      "target":
       {
          "oneOf":
          [
            { "$ref": "id.json#/definitions/arraySingleStringUri" },
            { "allOf":
               [
                  { "$ref": "otherProperties.json#/definitions/canonicalValidIfPresent" },
                  { "$ref": "specificResource.json#/definitions/sourceWithCanonical" }
               ]
            },
            {
                "type": "array",
                "minItems": 1,
                "items":
                {
                    "oneOf":
                    [
                        { "$ref": "id.json#/definitions/arraySingleStringUri" },
                        { "allOf":
                           [
                              { "$ref": "otherProperties.json#/definitions/canonicalValidIfPresent" },
                              { "$ref": "specificResource.json#/definitions/sourceWithCanonical" }
                           ]
                        }
                    ]
                }
            }
          ]
       }
   }
}