SV: Usage of Compositoin.Category

Thomas Beale thomas.beale at
Fri Mar 11 08:11:33 EST 2016

Currently I think we filter on 'report' COMPOSITIONs via something like:


So that would not need any change to the COMPOSITION.category to be 
achieved. Not saying there are not reasons to do it, just that the 
normal way today seems to satisfy the requirement.

Secondly, just a mechanical AQL thing: it should normally be possible to do:

WHERE c/category/defining_code matches {[openehr::434]}

- thomas

On 10/03/2016 12:32, Bjørn Næss wrote:
> Hi Ian
> Great response.
> The most important thing for me is to precisely define the semantic meaning of the content in a composition. In this specific use-case the content of the composition is always a copy of the primary source.
> This means that the Discharge letter only bring one new thing into the EHR - that is the fact that there is an approved discharge letter. But the entries in the composition is link and copies of entries in other primary sources.
> The requirements to the system is quite small:
> * Content of "report" documents MUST not be in the resultset when doing normal AQL queries.
> * It MUST be possible to query for "report" compositions with specific content.
> The solution to this problem is simple and I can give an example with an AQL query. Below is a standard query for body weight. Look at the WHERE condition. Here I am looking for all body weights which are NOT part of a report composition. This WHERE condition will be the default filter on all queries.
> If the client would like to query for all body weights in report document, then just change from NOT EQUALS 434 to EQUALS 434.
> 	SELECT o/data[at0002]/events[at0003]/data[at0001]/items[at0004]/value/magnitude
> 	WHERE c/category/defining_code/terminology_id/value = 'openehr'AND c/category/defining_code/code_string != '434'
> Given that we agree that there is a class of compositions which belongs to the "report" group.
> Then we should add such semantic into the RM to make it precise and consistent.
> Best regards
> Bjørn Næss
> Product owner
> Mobil +47 93 43 29 10

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