Hi Leo, I think this wiki page probably explains this particular issue
http://www.openehr.org/wiki/display/dev/Existence+of+Attributes+(AOM,+ADL+and+XML) <http://www.openehr.org/wiki/display/dev/Existence+of+Attributes+(AOM,+ADL+and+XML)>but it is pushing my technical knowledge to the limit, so I hope someone else will pitch in to any further discussion. Ian Dr Ian McNicoll office / fax +44(0)141 560 4657 mobile +44 (0)775 209 7859 skype ianmcnicoll ian.mcnicoll at oceaninformatics.com ian at mcmi.co.uk Clinical Analyst Ocean Informatics openEHR Archetype Editorial Group Member BCS Primary Health Care SG Group www.phcsg.org / BCS Health Scotland On 29 June 2010 16:13, Leonardo Moretti <lmoretti at noemalife.com> wrote: > > Thank you Ian, you are right, null_flavour tag is not needed. > But in the previous post I proposed also an other change: in the original > ADL code > ELEMENT[at0033] occurrences matches {0..1} matches { -- Comment > value matches { > DV_TEXT matches {*} > } > } > value doesn't have the existence attribute specified. > Being the default for existence attribute {1..1}, a DV_TEXT value tag is > required! But when we have an empty Comment, we cannot have a DV_TEXT value > tag, so we can neither have the whole ELEMENT structure, and so we cannot > specificy a null_flavour! > > To be able to do this, this extension would be needed: > ELEMENT[at0033] occurrences matches {0..1} matches { -- Comment > value existence matches {0..1} matches { > DV_TEXT matches {*} > } > } > > regards > leo > > > Ian McNicoll-3 wrote: > > > > Hi Leo, > > > > No it works the other way round. All of the null flavours are > > automatically > > available unless you specifically constrain them out. > > > > Ian > > > > Dr Ian McNicoll > > office / fax +44(0)141 560 4657 > > mobile +44 (0)775 209 7859 > > skype ianmcnicoll > > ian.mcnicoll at oceaninformatics.com > > ian at mcmi.co.uk > > > > Clinical Analyst Ocean Informatics openEHR Archetype Editorial Group > > Member BCS Primary Health Care SG Group www.phcsg.org / BCS Health > > Scotland > > > > > > -- > View this message in context: > http://old.nabble.com/Empty-string-for-DV_TEXT-tp28993527p29024820.html > Sent from the openehr-technical mailing list archive at Nabble.com. > > _______________________________________________ > openEHR-technical mailing list > openEHR-technical at openehr.org > http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openehr.org/mailman/private/openehr-technical_lists.openehr.org/attachments/20100629/e0307f7a/attachment.html>
