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For full details including the historical background to ECL please see: Expression Constraint Language - Specification and Guide

Appendix A of that guide has links to various examples - the Appendix overview is reproduced here, including active links to its sub-pages.

Below the Appendix overview, its sub-page A.1 Simple Expression Constraints - Valid Expressions is also reproduced here as a quick-reference.


A.1 Simple Expression Constraints - Valid Expressions


Expression Constraint

Valid Expression1

Precoordinated

Postcoordinated

-

-

*

 

Footnotes
Ref Notes
1 Where necessary, these examples make some assumptions about the membership of the example reference sets.
2 Please note that this makes the assumption that the given expression constraint is executed against a finite set of expressions that has been pre-classified (e.g. in an expression repository), and that after classification there are no intermediate expressions between this expression and 404684003 |Clinical finding|.
3 Please note that this makes the assumption that the given expression constraint is executed against a finite set of expressions that has been pre-classified (e.g. in an expression repository), and that after classification there are no intermediate expressions between 40541001 |Acute pulmonary edema| and this expression.

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