CSCR-050 Make ObservationRange.negationInd and Criterion.negationInd optional
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|Submitted by: Rik Smithies||Revision date: 12-Feb-2006|
|Submitted date: 12-Feb-2006||Change request ID: CSCR-050|
ObservationRange.negationInd and Criterion.negationInd are [1..1] required
- Change ObservationRange.negationInd and Criterion.negationInd to be [0..1] optional
Terminfo guidance and thinking in NHS/UK domain, rules out the use of negationInd when act.code contains a code from a scheme that already encompasses negation (eg SnomedCT). Currently negationInd cannot be refined out in models that mandate such a coding scheme, leading to potential inconsistency.
Negation is a liabilty. If not using SNOMED you still need to say it.