{
  "$id": "https://opendatafabric.org/schemas/resources/v1alpha1/meta/ResourceAnnotation",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "description": "Metaschema for annotation schemas. Annotations are non-indexed key-value pairs attached to resources intended for human readers and external tooling. Unlike labels, annotations are not queryable via the resource system.",
  "allOf": [
    {
      "$ref": "https://json-schema.org/draft/2020-12/schema"
    },
    {
      "type": "object",
      "properties": {
        "resourceTypes": {
          "type": "array",
          "description": "List of resource type URIs this annotation is valid for. When absent the annotation is allowed on any resource type.",
          "items": {
            "type": "string",
            "format": "type-uri"
          }
        }
      }
    }
  ]
}