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SNOMED CT expression constraint language version 1.5 6 has been published at http://snomed.org/ecl.
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- An ANTLR grammar of the ECL syntaxes
- A set of invalid expression constraints that should fail in testing an expression constraint parser
- A set of valid results for each example expression constraint, executed against a specific version of the SNOMED international edition
- Track changes, change bars or similar to make it easier for implementers to identify the areas of change. In addition, changes should be localized and minimized.
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