Frame prototypes are moulds that create consistent looking frames or skins over the analytical infrastructure of dashboards. Prototypes determine the layout and features available for frames on dashboards. See Creating Frame Prototypes.
A template can contain several frame prototypes with individual layouts and features. Frame prototypes available in the express template (Express_Template.bqy) are different to the set available in the panel templates. The Frame_Library.bqy template combines frame prototypes for the Oracle's Hyperion® Dashboard Development Services components and the panel prototypes in the one file.
In pre-8.2 Releases of Dashboard Studio, frame prototypes were called frame templates.