metaRef

This attribute defines a URI of a schema that contains the full representation of this schema.

When a validator encounters this attribute, it should replace the current schema with the schema referenced by the value's URI (if known and available) and re- validate the instance.

This URI may be relative or absolute, and relative URIs should be resolved against the URI of the current schema.

(Implementation note: $ref is instead named metaRef internally to prevent the amount of escaping required to escape the $ character, which is normally reserved for template strings and the like.)