Currently the model is missing the ability for a Task or Task Group to refer to a particular guideline step within a guideline and/or care pathway referenced by the enclosing Task Plan and Work Plan, respectively.

Additionally, these latter references are currently of type DV_IDENTIFIER, which is not well suited to representing publication references, and should be changed to ITEM_STRUCTURE, to allow the use of a Citation archetype to provide a proper reference, e.g. based on BibTex fields.