Hi Rahil,

Rahil Qamar wrote:
> Hi
>
> I hope its all right to ask a few standards related question on this forum.
>
> I wanted to know how different the openEHR and CEN Ref Models and 
> Archetypes are from each other at a logical level. Is it necessary to 
> understand the CEN stds if working with openEHR stds?
Depends on what you want to do ;-) In the near future, the automatic 
bidirectional transformation for openEHR/CEN will be completed (when CEN 
works out what data types it is using). This will mean openEHR tools 
will be able to generate CEN structures automatically. It may be worth 
looking at the openEHR EHR Extract specification as well. This is not 
yet finished, but will offer significantly more power than the CEN 
Extract, while containing a CEN-like mode to act as a wrapper for 
CEN-encoded information.
>  In particular, is 
> it important to know the CEN13606 archetypes if working with openEHR 
> archetypes. At a logical level what are the differences between the two?
>   
others may know better, but at the moment I don't know of any CEN 
archetypes.
> Another topic area that alludes my understanding is a clear 
> parallel/possible relationship of HL7 Templates and the use of 
> 'templates' in openEHR archetypes (the later concept I am very clear 
> about.. its the HL7 view of templates Im not sure of). It'll just help 
> in my understanding of hl7 templates w.r.t. archetypes, as parallels are 
> often drawn between the two.
>   
We would like to know that as well ;-) What I know at this stage is that 
an HL7 template is a specialised XML-schema of a base XML-schema such as 
the CDA schema. There is no distinction in HL7 that I know of between 
what we call archetypes and templates in openEHR. At the best, you would 
have to say that an HL7 template is like an openEHR template that is 
built like an archetype, i.e. no re-use of anything, just a single giant 
archetype built for the particular purpose at hand (which would normally 
make us call it a template...)...

- thomas beale



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