On 06/05/2010 08:48, Sebastian Garde wrote:
> Hi Thomas,
>
> do you know if there is a formal way of how RefSets (=the resulting 
> Snomed CT codes etc.) and the RefSet query (=the query on Snomed CT to 
> get to the RefSet) are expressed and shared?

the ref set results are defined by Snomed RF2 ref set specs, now in 
draft. I don't know whether they are allowed to be shared outside 
IHTSDO, but will find out. The query language is still an open question.

> Similar to what is described here but based on RefSets: 
> http://www.openehr.org/wiki/display/term/Ocean+Terminology+Query+Language+%28TQL%29
>  
>
>
> I agree that RefSets are a good way forward, but they need to be 
> available, reusable and sharable, etc.

they do. The current IHTSDO thinking is that ref sets will mainly be 
defined by national release centres and maintained in the national 
extensions, with some major refsets being in the international release. 
I think this is far too restrictive a view, and that in future they will 
be defined and maintained in health care facilities, regional 
information centres and anywhere else that needs them. The IHTSDO 
representation and extension mechanism should be usable at all these 
levels. How it could be used for openEHR I have yet to find out, but am 
making enquiries as a member of the IHTSDO Technical Committee).

- thomas*
*
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