Adding the $2 validation opens the door to using so many controlled thesauri, like Spanish headings via Queens and National Library of Spain, OLAC's video game headings, Homosaurus' headings, and many more that would make searching easier for customers and staff by providing access points that mimic how they talk about their interests and information needs.

It would be a step closer towards inclusion by using various existing vocabularies that institutions want to use, unlock more potential of the ILS, as well as improve authority maintenance overall.