CSCR-065 Make conjunctionCode 0..1 optional on precondition

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Submitted by: Rik Smithies	Revision date: 19-Jun-1006
Submitted date: 19-Jun-1006	Change request ID: CSCR-065

Issue

Precondition off ObservationRange and also off Criterion have conjunctionCode – [0..1] Required.

Some models have no use case for "condition links" between thes acts and so never need to use conjunctionCode.

Since it is Required models cannot be Clinical Statement compliant without supporting this.

This is very similar to the previously agreed CSCR-048

Recommendation

• Relax these attributes to be 0..1 Optional.

Rationale

This means the attributes can be refined out completely in models that don't need them.