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- Fill out the "Add Refset" dialog and select "INTENSIONAL" as the Type. The definition Definition must be in the format of the ECL (Expression Constraint Language)
(e.g.) <<406455002 | Allergen class (substance) | - See http://www.snomed.org/news-articles/expression-constraint-language for details about the ECL.
- Resulting subset will appear as follows with refset members populated based on the provided defintion.
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