Re: Archetypes and XML-Schemas
> This is a binary constraint. For this reason we are proposing that > existence > is represented as an optional attribute with 2 values > 'required' and 'prohibited'. Sam, an optional attribute with 2 values actually allows 3 states. Of course the default will map to one of the two values - but this does allow 2 ways of expressing the same concept. My two preferences for this situation (representing binary constraints) a) mandatory attribute with 2 values - or - b) an optional attribute with ONE possible value, and where the absence of the value is the default. Andrew _______________________________________________ openEHR-technical mailing list openEHR-technical@openehr.org http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical