conditional-validation.json

{
	"$schema": "http://json-schema.org/draft-07/schema#",
	"title": "Conditional Validation",
	"description": "Require a data dictionary only if the metadata resource type is 'tabularDataset'.",
	"$id": "require-fields.json",
	"version": "1.0.0",
	"properties": {
		"metadata": {
			"properties": {
				"resourceInfo": {
					"properties": {
						"resourceType": {}
					}
				}
			}
		},
		"dataDictionary": {}
	},
	"if": {
    "properties": {
      "metadata": {
        "properties": {
          "resourceInfo": {
            "properties": {
              "resourceType": {
                "contains": {
                  "properties": {
                    "type": {
                      "const": "tabularDataset"
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "then": {
    "required": [
      "metadata",
      "dataDictionary"
    ]
  },
  "else": {
    "required": [
      "metadata"
    ]
  }
}