Various changes are required to the EHR Extract to be properly compliant to the Release 1.0 reference model, as follows.
An extract form of the RM class VERSIONED_OBJECT is needed in the extract, corresponding to the changed definitions of the classes VERSIONED_OBJECT and VERSION in the RM. The X_ variants are data-oriented classes.
There are two requirements for Folders in Extracts. The first is that the Extract may be required to faithfully carry the Folder structure from an openEHR system (including its previous versions - just as for Compositions) elsewhere. The other is that users might want to create Folders local to the Extract itself (e.g. for the parts of a Discharge summary). Only the second of these requirements is currently addressed.