On 18/08/2018 07:56, Bert Verhees wrote:
I cannot imagine how a folder structure can get lost except by data corruption. In that case anything is lost anyway and a rollback from a backup is needed.
It's a thought experiment, not a serious proposition about a real system. But it partially answers the question: what is in an EHR? If Folders contain some extra information that can't be reconstructed by running specific queries, then probably the Folders are a first order part of the EHR rather than just an optimising data structure.
In fact there should not be a folderstructure in the database. There are folder objects which contain a list of references (data) to compositions. Not the compositions itself are in those lists. That would not be possible because a composition can be referenced in more then one folder.
There can be a Folder structure (= hierarchy of Folders), even though (as you say) Folders only hold refs to Compositions, and more than one Folder can point to the same Composition.
- thomas _______________________________________________ openEHR-technical mailing list [email protected] http://lists.openehr.org/mailman/listinfo/openehr-technical_lists.openehr.org
