Hi Tom and Diego, The reference workbench only has an interval constraint on duration as it is the logical constraint. If this is a point duration then it still expresses a range. Not sure if this has changed over time. Cheers, Sam
> -----Original Message----- > From: openehr-technical-bounces at openehr.org [mailto:openehr-technical- > bounces at openehr.org] On Behalf Of Thomas Beale > Sent: Tuesday, 31 January 2012 2:51 AM > To: openehr-technical at openehr.org > Subject: Re: DV_DURATION as ranges > > > I thought I had replied to this, but must not have. Anyway, I don't > understand why single point values are not used either, rather than > point ranges (which seem somewhat pointless ;-) > > - thomas > > On 25/01/2012 22:56, Diego Bosc? wrote: > > No comments about this one? > > > > 2012/1/13 Diego Bosc?<yampeku at gmail.com>: > >> As Ian suggested I copy this issue from CKM to the technical list. > >> I have seen that in some archetypes (e.g. Apgar or BloodPressure) > >> that use DV_Duration restrictions (such as the width of the interval > >> event in the blood pressure archetype or the famous offset in the > >> apgar > >> archetype) define them like this: > >> > >> offset existence matches {1..1} matches { > >> DV_DURATION[at0040] occurrences matches > >> {0..1} matches { -- > >> value existence matches {1..1} > matches {|PT10M|} > >> } > >> } > >> > >> As you can see, even if it is a single default value (10 minutes), > >> they are defined as ranges. As durations allow the definition of > >> default values (and they parse correctly) I think they should be > >> changed to this: > >> > >> offset existence matches {1..1} matches { > >> DV_DURATION[at0040] occurrences matches > >> {0..1} matches { -- > >> value existence matches {1..1} > matches {PT10M} > >> } > >> } > >> > >> As checking a concrete value is always easier than a range I would > >> suggest to change them to that. > > _______________________________________________ > openEHR-technical mailing list > openEHR-technical at openehr.org > http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical
