This problem is solved by the use of the subjected indicators (at the origin called “descriptors
This problem is solved by the use of the subjected indicators (at the origin called “descriptors subjected” to OIN 13250). A subjected indicator is “a resource which is envisaged… to provide a positive and nonambiguous indication of the identity of a subject.” Since it is a resource, a subjected indicator has an address (usually a URI) which can be employed like “marks subjected”.