In general follow the guidelines for single items or published groups except where indicated below:
Type of Record: Required
Use value ‘g’ (projectable medium)
Use value ‘k’ (two-dimensional nonprojectable graphic) This code is recommended for all graphic materials including digital images and slides.
Use value ‘p’ (mixed materials) if the group also includes other material types (e.g., cartographic, music, manuscript, etc.)
Bibliographic Level: Required
Use the value ‘c’ (collection-level or group level) for a record describing groups or collections.
Use the value ‘d’ (subunit) for single items contained in larger groups or collections that have their own catalog records.