I think maybe actual modelling practice should be taken into account here. 
Since these guidelines haven't been available, several important percentages in 
published archetypes have been modelled as DV_PROPORTION:
openEHR-EHR-CLUSTER.inspired_oxygen.v1 
https://ckm.openehr.org/ckm/#showArchetype_1013.1.393 
openEHR-EHR-OBSERVATION.pulse_oximetry.v1 
https://ckm.openehr.org/ckm/#showArchetype_1013.1.3084 

The way I understand the arguments here, there isn't a good one for changing 
these data types and going to v2 for these archetypes?

Regards,
Silje

-----Original Message-----
From: openEHR-technical <openehr-technical-boun...@lists.openehr.org> On Behalf 
Of Thomas Beale
Sent: Saturday, January 5, 2019 3:36 PM
To: openehr-technical@lists.openehr.org
Subject: Re: DV_PROPORTION vs DV_QUANTITY for %


On 05/01/2019 12:56, Ian McNicoll wrote:
> There is a very clear use-case for having it there - O2 levels 
> variably and equivalently described a FiO2 which is a unitary 
> proportion or percent.
>
> I think we need to keep it for that reason if no other.

So in that case we need to upgrade the documentation for when to choose a 
DV_QUANTITY percent, and when a DV_PROPORTION %.

- thomas



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