Annex A defines Composite IODs (e.g., Images) acquired on a number of Modalities (e.g., CT, MR, NM, US, CR, Secondary Capture). These Composite IODs reference Modules found in Annex C.

Annex B defines Normalized IODs (e.g., Film Session, Print Job) for a number of Service Classes specified in PS3.4. These Normalized IODs reference Module definitions found in Annex C.