CSCR-042 Refine Observation Act

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Submitted by: Heath Frankel	Revision date:
Submitted date: 6 Feb. 2006	Change request Id: 042

Issue

Observation act constrains code attribute to [1..1] required. This seems to assume a partular usage of the code/value pattern and until TermInfo can give conclusive general guidance for all vocabularies this should not be assumed.

Recomendation

• Change code attribute to [0..1] optional

Rationale

There still seems to be indecision about the usage of code and value in Observation Acts. There seems to be three options depending on what vocabularies you use or even which realm you use those vocabularies. As one of these options is to use the value attribute only and not use the code attribute. Until this guideance is conclusive it seems premptive to constrain the Clinical Statement assuming that the code attribute will always be used.