Tim This is a good point - and we need to look at it. The sequence I am talking about here is not an administrative sequence but an single entry - so it is not possible to have a tie (as in an array). For the others the number is not critical as it is dated and timed anyway.
Sam > -----Original Message----- > From: owner-openehr-technical at openehr.org > [mailto:owner-openehr-technical at openehr.org]On Behalf Of Tim Churches > Sent: Thursday, 23 October 2003 1:11 PM > To: Sam Heard > Cc: Openehr-Technical > Subject: Re: Pathology requirements TIMED MEASUREMENTS > > > Sam Heard <sam.heard at bigpond.com> wrote: > > > > TIMED MEASUREMENTS > > 2. We have a sequence idea in the event model, by using the offset > > but > > having 'sequence' as the unit rather than time. This would mean that > > people > > did not have to enter spurious times in the data and name the event > > as > > Sample 1, which could be misleading. > > The ability to capture the order of a sequence of events is > fundamental in a whole > range of health domains. Don't forget to allow for ties i.e. two > or more events with > the same sequence number. > > Also, time deltas are necessarily zero-based. Will sequences be > zero-based? > There are cogent arguments both ways...but I suspect that they > shouldn't be (in > EHRs). > > Tim C > - > If you have any questions about using this list, > please send a message to d.lloyd at openehr.org > - If you have any questions about using this list, please send a message to d.lloyd at openehr.org
