The task force is charged with determining data elements for describing rare materials that are complementary to existing standards like DCRM and controlled vocabularies. Without consistent encoding and granular data, rare materials discovery is diminished. The task force proposes a framework of linked metadata elements for rare materials description that will enable improved discovery and utilization of existing standards. The framework includes over 50 proposed data elements across various categories for describing physical features, user engagement, production processes, and rights/restrictions.