HL7 and negation

GF gfrer at luna.nl
Wed Jun 8 02:54:20 EDT 2016

Dear Colleagues,

HL7 is thinking about the problem of negation.
 http://wiki.hl7.org/index.php?title=Negation_Requirements <http://wiki.hl7.org/index.php?title=Negation_Requirements>
The group discussing it created a document with negation use cases.

My questions are:
- Can you let us know your reaction to this list of use cases?
- How should ‘negation’ be handled the best in respect of semantic interpretability?

My personal opinions:
- the boolean should not be used
- try to translate the ‘negation’ problem into ‘presence and absence’. A concept is or is not present, a numeric result is of is not present.
- do not use pre- and post co-ordinated concepts using SNOMED but use the SNOMED primitives.

I’m curious to learn what your opinion is.

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