Hi Silje,
I don't understand how adding an 'Arbitrary' term to the openEHR
terminology helps things. DV_QUANTITY.units is a UCUM String field.
Won't the strange units just turn up in the String form you quoted for
UCUM arbitrary units in that field?
(BTW, to ask for a new terminology term, just create a new issue on the
PR tracker with component=New Term Request - choose this from the dropdown).
Setting property and not units makes sense - and if we had a proper,
standardised units service, a runtime archetype evaluator would use it
to limit the actual units for property = pressure (say) to only pressure
units. I think we need to define such a service properly....
- thomas
On 24/01/2018 09:52, Bakke, Silje Ljosland wrote:
Hi all,
I’m working on representing medication strengths in archetypes at the
moment. Most medications are thankfully measured in SI units such as
mg/ml or mg/{dose unit}, but others use arbitrary units that are not
derived from any other physical dimensional units. Examples of these
are standardized quality units (SQ-U), focus forming units (FFU),
European and American pharmacopoeia units, anti factor Xa units, or
international units (IU). There are seemingly an unlimited number of
these units, and they apparently make up new ones as they go along
(ref: SQ-T and SQ-HDM). See
http://unitsofmeasure.org/ucum.html#para-45 for more.
UCUM has a generic way of representing these, as “[arb’u]{whatever}”
(arbitrary unit, name of the unit), but openEHR doesn’t seem to have a
property in its Quantity data type for them. Could it be a possibility
to add an “Arbitrary” property to the openEHR support terminology for
unit properties?
Also, is it ok to model Quantity elements with a property set but the
units left unconstrained? I’ve just started trying to add these units
to an archetype (as a concentration, so got around the property
issue), and it’s just a never ending task.
Kind regards,
*Silje Ljosland Bakke*
**
Information Architect, RN
Coordinator, National Editorial Board for Archetypes
Nasjonal IKT HF, Norway
Tel. +47 40203298
Web: http://arketyper.no <http://arketyper.no/>/ Twitter:
@arketyper_no <https://twitter.com/arketyper_no>
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--
Thomas Beale
Principal, Ars Semantica <http://www.arssemantica.com>
Consultant, ABD Team, 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/>
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