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.

Ian

Dr Ian McNicoll
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Co-Chair, openEHR Foundation ian.mcnic...@openehr.org
Director, freshEHR Clinical Informatics Ltd.
Director, HANDIHealth CIC
Hon. Senior Research Associate, CHIME, UCL


On Sat, 5 Jan 2019 at 12:07, Thomas Beale <thomas.be...@openehr.org> wrote:

> Hi Silje,
>
> See here
> <https://specifications.openehr.org/releases/RM/latest/data_types.html#_ratios_and_proportions>.
> But I think the % case may have been there since early 2000s and either %
> was not in UCUM, or perhaps it was, but we did not realise it. So ideally
> we should change the documentation to obsolete it in DV_PROPORTION.
>
> - thomas
> On 04/01/2019 20:40, Bakke, Silje Ljosland wrote:
>
> In that case, I don't understand the use case for the 'percent' and 'unitary' 
> variants of the DV_PROPORTION data type. What are they for?
>
> Regards,
> Silje
>
> -----Original Message-----
> From: openEHR-technical <openehr-technical-boun...@lists.openehr.org> 
> <openehr-technical-boun...@lists.openehr.org> On Behalf Of Thomas Beale
> Sent: Friday, January 4, 2019 8:38 PM
> To: openehr-technical@lists.openehr.org
> Subject: Re: DV_PROPORTION vs DV_QUANTITY for %
>
>
> On 03/01/2019 08:37, David Moner wrote:
>
> I think DV_QUANTITY is the option here. Someone could argue that % is
> not a proper unit, but it is, both in UCUM and SNOMED CT.
>
> DV_PROPORTION should be only used when you want to maintain the
> numerator and denominator explicitly separated, as a fraction, which
> should not be the case with percentages. But it is true that the
> definition of the type attribute in the specification is a bit
> misleading: "Indicates semantic type of proportion, including percent,
> unitary etc."
>
> David is right on all counts - use DV_QUANTITY, but we should fix that line 
> in the specification. Can someone raise a PR on that please.
>
> - thomas
>
>
>
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> --
> Thomas Beale
> Principal, Ars Semantica <http://www.arssemantica.com>
> Consultant, ABD Project, Intermountain Healthcare
> <https://intermountainhealthcare.org/>
> Management Board, Specifications Program Lead, openEHR Foundation
> <http://www.openehr.org>
> Chartered IT Professional Fellow, BCS, British Computer Society
> <http://www.bcs.org/category/6044>
> Health IT blog <http://wolandscat.net/> | Culture blog
> <http://wolandsothercat.net/> | The Objective Stance
> <https://theobjectivestance.net/>
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