Greg Caulton wrote: > Question on the query below, if at0004 occurs *only* once in the > archetype model, in the position > data[at0001]/events[at0002]/data[at0003]/items[at0004]/value, could > one theoretically have the shorter query > Greg, while it is sometimes the case that an at-code is unique within the archetype, there are many archetypes where this is not so. The general case is that a leaf-level at-code will re-appear on numerous leaf nodes, due to multiple Events, or multiple panel items in a pathology test battery or somesuch.
However, using the Xpath // construct, one could achieve what you are after, which would make the query slightly shorter. - thomas beale > SELECT o/items[at0004]/value > FROM EHR [uid = $ehrUid] CONTAINS OBSERVATION o > [openEHR-EHR-OBSERVATION.respiration.v1] > WHERE o/items[at0004]/value/magnitude > $n > > The reason I ask is it would be tempting to store (in my data model) > the single discrete value at0004 to map to my equivalent item. > > Of course that would break if a new data element was added in a > position (fabricated) > data[at0001]/events[at0099]/data[at00100]/items[at0004]/value but the > simplicity is tempting. > > thanks > > Greg > http;//www.patientos.org >
