This is the Reference Schema for the MIDAS standard, part of the FISH suite of XML schemas for the historic environment. Root reference element Element for recording references (or 'resources', formerly 'archives') associated with monuments and events. Title(s) and identifiers of refernece. Title(s) and identifiers of refernece. Reference type (image, notebook, colour slide, monograph), not to be confused with the reference medium Medium of reference (DVD, glass plate, computer file). Note that the reference type may be a book, but the medium, could be an e-book ("computer file"). Optional attribute for recording the (file) format of the medium Publisher of reference. Extent of reference; usually used for page references or similar Subject of reference Element for recording diverse, additional information, categorised by the 'type' attribute .