I agree with the initial idea about the optionality of existence, occurrences and cardinality; there is no need to state them if they are not changed from the reference model.
But one problem arises with the cardinality. As far as I know, the only way to differenciate a C_Single_Attribute and a C_Multiple_Attribute while parsing the ADL and generating the AOM instance is through the 'existence' of the cardinality constraint. If we don't have that keyword it is imposible to choose the correct attribute object. At the Jira issue we can read "with reference model checking...", but making the ADL parsers dependent of the RM is absolutely not a good idea in my opinion. 2009/6/30 Thomas Beale <thomas.beale at oceaninformatics.com> > > Dear all, > > as part of the specialisation semantics, which are nearly all > implemented in the ADL workbench, we have made existence, cardinality > and occurrences all optional. This is sensible for 'source' form > archetypes - i.e. it is natural that only overridden constraints be > stated in an archetype, if there is no override of either the reference > model or a specialisation parent archetype, where the latter is > relevant, then no constraint is needed. > > The change is described in http://www.openehr.org/issues/browse/SPEC-303 > > We have not yet released a new version of the ADL workbench with this > change, but will soon. What I would like to know is if the implementers > of other archetype parsers, compilers etc can deal with this change. > Note that it would normally be part of implementing the wider ADL 1.5 > semantics, since it is logically part of the specialisation semantics. > > has anyone else considered implementing these semantics yet? > > thanks > > - thomas beale > > > _______________________________________________ > openEHR-technical mailing list > openEHR-technical at openehr.org > http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical > -- David Moner Cano Grupo de Inform?tica Biom?dica - IBIME Instituto ITACA http://www.ibime.upv.es Universidad Polit?cnica de Valencia (UPV) Camino de Vera, s/n, Edificio G-8, Acceso B, 3? planta Valencia ? 46022 (Espa?a) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openehr.org/mailman/private/openehr-technical_lists.openehr.org/attachments/20090703/025ca78c/attachment.html>
