These are all good suggestions, and in fact we have become aware that the Date/time classes are not properly ISO8601 compliant. The 'T' problem has been fixed in the specifications, and the extended version of the Duration will be supported.
I have a more radical proposal as well: to scrap the PARTIAL_XX classes, and retain only DV_DATE, DV_TIME, DV_DATE_TIME and DV_DURATION. The partial semantics would be moved into these remaining 4 classes qite easily, and the nice thing about ISO8601 is it supports the partialness (reduced accuracy they call it) in exactly the way we want. So the result would be 4 classes that exactly implement ISO8601, while providing a standardised functional interface to dates and times in the EHR. We have already re-implemented the Java openEHR date/time classes using the joda libraries (http://joda-time.sourceforge.net/). These upgraded classes are part of the Release 1.0 upgrade of the openEHR Java classes, which should be uploaded to subversion soon and will be announced. Any further suggestions / thoughts welcome. - thomas beale babisr at yahoo.com wrote: > Although the latest spec defines that the DvDuration > has attributes such as days, hours etc the class lacks > the attribute years. > On the other hand, the draft XML Schema definition of > DvDuration (element DV_DURATION of BaseTypes.xsd), > defines the value of DvDuration as "xsd:duration", > which supports the notion of years. > In my opinion, this inconsistency may result to > ambiguous mapping of DV_DURATION element to DvDuration > class, and I propose to either restrict the definition > of DV_DURATION (to not accept years) or extend the > definition of DvDuration (introduction of years > attribute). > > Additionally, the java reference implementation of > DvDuration class (rev 28), has a factory method - > getInstance(String): DvDuration - that accepts a > string formatted according ISO8601. The method uses a > pattern to verify the provided string. I believe that > this pattern should follow the suggestion of ISO861 of > using the capital letter T, in the case where both > days and time are representing in the same string. > Because the XML Schema "xsd:duration" uses the capital > letter T, this minor change will make more > straightforward the mapping of DvDuration to XML. > > > > > > > > ___________________________________________________________ > ???????? ?? Yahoo!; > ??? ????? ?? ????????? ???????? (spam); ?? Yahoo! Mail > ?????? ? ??? ????? ?? ????? ?????? ???? ??? ?????????? > ???????? http://login.yahoo.com/config/mail?.intl=gr > > > > -- ___________________________________________________________________________________ CTO Ocean Informatics (http://www.OceanInformatics.biz) Research Fellow, University College London (http://www.chime.ucl.ac.uk) Chair Architectural Review Board, openEHR (http://www.openEHR.org)
