On 02/08/2011 13:13, Sebastian Garde wrote: > Hi Seref, > > interesting, I think Thomas changed this rule for ADL 1.5 to: > VACMC - cardinality/occurrences validity: where occurrences and > cardinality are stated, the interval represented by: (sum of all > occurrences minimum values) .. (sum of all occurrences maximum values) > must intersect with the interval stated by the cardinality. > > Thomas and I had a discussion about some edge cases here a while ago, > where you could make this rule a little more strict potentially, but > in any case it seems to be a necessary condition for a correct archetype. > > My take is that VCOC prevents functionality that is needed and is > simply too strict and was therefore modified to VACMC in ADL1.5 - Thomas? > > Sebastian
Yes. We should allow the two 0..x constraints. The cardinality constraint says you must have at least 1 thing in the list, and the two other constraints each say - separately - that the EVENT and INTERVAL_EVENT matching objects can single have 0 instances. Taken together, it is all compatible. The reworded rule above, quoted by Sebastian, says that it has to be at least /possible/ to meet the constraints. - t -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openehr.org/mailman/private/openehr-technical_lists.openehr.org/attachments/20110802/7c097aff/attachment.html>
