Fair point. Perhaps AQL should support ranges of version numbers to simplify the query as in many cases the query will not be affected by a structrural change to the archetype
e.g. > FROM EHR [ehr_id/value=$ehrUid] > CONTAINS COMPOSITION [openEHR-EHR-COMPOSITION.encounter.v[BETWEEN 1.5 AND 2] > CONTAINS OBSERVATION obs [openEHR-EHR-OBSERVATION.blood_pressure.v[>=1] > WHERE ( > obs/data[at0001]/events[at0006]/data[at0003]/items[at0004]/value/value >= > 140 Versions and revisions would need to be handled. Ian 2008/6/3 Greg Caulton <caultonpos at gmail.com>: > > ------------------------------ > > Message: 2 > Date: Tue, 03 Jun 2008 16:39:37 +0100 > From: Thomas Beale <thomas.beale at oceaninformatics.com> > Subject: openEHR Querying specifications > To: Openehr-Technical <openehr-technical at openehr.org> > Message-ID: <484565B9.6030805 at oceaninformatics.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > The current material is therefore intended as a resource for discussion > and definition of a query language for openEHR. A team can be defined > after sufficient time for the community to react to this material and > determine if it makes sense to use AQL as the basis or to seek other > solutions or candidates. > > - thomas beale > > > > Perhaps this has been answered but as the archetypes change version is it > expected that the AQL will need to keep up with that - I assume our historic > data would be specific to the archetype version - not 'upgraded' ? > > i.e. after v1: > > FROM EHR [ehr_id/value=$ehrUid] CONTAINS COMPOSITION > [openEHR-EHR-COMPOSITION.encounter.v1] > CONTAINS OBSERVATION obs [openEHR-EHR-OBSERVATION.blood_pressure.v1] > WHERE obs/data[at0001]/events[at0006]/data[at0003]/items[at0004]/value/value >>= 140 > > after v2: > > FROM EHR [ehr_id/value=$ehrUid] > CONTAINS COMPOSITION [openEHR-EHR-COMPOSITION.encounter.v1] > CONTAINS COMPOSITION [openEHR-EHR-COMPOSITION.encounter.v2] > CONTAINS OBSERVATION obs [openEHR-EHR-OBSERVATION.blood_pressure.v1] > CONTAINS OBSERVATION obs2 [openEHR-EHR-OBSERVATION.blood_pressure.v2] > WHERE ( > obs/data[at0001]/events[at0006]/data[at0003]/items[at0004]/value/value >= > 140 OR > > obs2/data[at0001]/events[at0006]/data[at0003]/items[at0004]/value/value >>= 140 ) > > not sure if that is exactly right. > > thanks! > > Greg > > > http://www.patientos.org > _______________________________________________ > openEHR-technical mailing list > openEHR-technical at openehr.org > http://lists.chime.ucl.ac.uk/mailman/listinfo/openehr-technical > > -- Dr Ian McNicoll office +44(0)141 560 4657 fax +44(0)141 560 4657 mobile +44 (0)775 209 7859 skype ianmcnicoll Consultant - Ocean Informatics ian.mcnicoll at oceaninformatics.com Consultant - IRIS GP Accounts Member of BCS Primary Health Care Specialist Group ? http://www.phcsg.org
