Hi all, I like Sam's proposal. It is exactly how DV_QUANTITY works today.
Cheers, Rong On 29 April 2010 22:45, Sam Heard <sam.heard at oceaninformatics.com> wrote: > I agree ? could we make DV_ORDINAL have a real value and allow constraint to > integer through precision which would default to 0. This would maintain > compatibility and not get too complicated. It is just the reality that > things get a little abused. > > Cheers, Sam > > > > From: openehr-clinical-bounces at chime.ucl.ac.uk > [mailto:openehr-clinical-bounces at chime.ucl.ac.uk] On Behalf Of Mark Leaning > Sent: Monday, 26 April 2010 9:43 PM > > To: 'For openEHR clinical discussions' > Subject: RE: ??? DV_CODEDQUANTITY > > > > Tom: > > The suggestion of making the numeric attribute real as opposed to integer > seems to me a pragmatic approach. > > Cheers > > Mark > > > > Mark S Leaning PhD > > > > > > From: openehr-clinical-bounces at chime.ucl.ac.uk > [mailto:openehr-clinical-bounces at chime.ucl.ac.uk] On Behalf Of Thomas Beale > Sent: 22 April 2010 18:45 > To: openehr-clinical at openehr.org > Subject: Re: ??? DV_CODEDQUANTITY > > > > The wiki one is interesting. Correspondences with openEHR (see information > model at > http://www.openehr.org/uml/release-1.0.1/Browsable/_9_0_76d0249_1109599337877_94556_1510Report.html): > > nominal 'scale' - this is not really a scale, but a classification concept, > expressed using DV_CODED_TEXT > ordinal scale - DV_ORDINAL > interval scale - this is formalised by the abstract type > DV_ABSOLUTE_QUANTITY, whose only current subtypes are DV_DATE, DV_DATE_TIME > and DV_TIME. These types don't have + or - defined in the normal way, > although add and subtract operations (different semantics do apply). > ratio scale - this is formalised in the type DV_AMOUNT, which models exactly > the concept of quantities with a meaningful 0 point and for which + and - > operations are defined. Concrete subtypes are DV_QUANTITY, DV_COUNT, > DV_DURATION and DV_PROPORTION. > > this article doesn't seem to mention non integer 'ordinals' though... > > - thomas > > > On 22/04/2010 10:13, Mark Leaning wrote: > > This Wikipedia article is not bad: > http://en.wikipedia.org/wiki/Level_of_measurement > > > > > > _______________________________________________ > openEHR-clinical mailing list > openEHR-clinical at openehr.org > http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-clinical >
