The FISH Resource Description Thesaurus, jointly developed by the National Trust and English Heritage, includes terminology for archival resource type, format and material (for example, ‘a diary’ and ‘hardcopy > paper’).
Click the first link on the right-hand side to open this resource as a PDF in your current browser window.
Click the second link on the right-hand side to visit the Heritage Data website where you can download the RDF formats of the thesaurus.