Dear Graham,

Thank you for your frank answers.

It is clear.
CEN and HL7 are on diverging paths with respect to Templates and  
Archetypes.

Gerard


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On Oct 17, 2007, at 1:27 AM, Grahame Grieve wrote:

>> Is multiple inheritance in the use case you presented, the only  
>> solution?
>> I expect it is not.
>> So why use it.
>> When 'data integrity' is a recurring issue in several archetypes,  
>> re-use
>> by inclusion of  a 'data integrity' archetype in an other  
>> archetypes is
>> a better other solution.
>
> It would be better if you didn't have to do that - didn't have to  
> consider
> *everything* in each design. But on balance, I believe that multiple
> inheritance raises more problems that it solves.
>
>> I'm not closely following HL7 Templates.
>> Are the HL7 Templates a separate and diverging piece of work when
>> compared to EN13606-2 or harmonising?
>
> There is no simple answer to that. Really, it's the wrong question.
> It's like asking whether the icing on the cake is helping make
> two totally different cakes the same or not.
>
>> Do both the HL7 Templates and CEN Archetypes share identical  
>> requiremenets?
>
> again, this is hard to answer. Archetypes and Static models share very
> similar requirements - they are both constraint and ontology binding
> models. Templates is a way of re-using the constraint models in a form
> that the openEHR/13606 community have not tried to investigate; the
> design intends to meet those requirements differently. Only time will
> tell which is the right approach.
>
> Grahame

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