Updated COHORT_DEFINITION (markdown)
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|definition_type_concept_id|Yes|integer|Type defining what kind of Cohort Definition the record represents and how the syntax may be executed|
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|cohort_definition_syntax|No|varchar(MAX)|Syntax or code to operationalize the Cohort definition|
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|subject_concept_id|Yes|integer|A foreign key to the Concept to which defines the domain of subjects that are members of the cohort (e.g., Person, Provider, Visit).|
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|cohort_instantiation_date|No|Date|A date to indicate when the Cohort was instantiated in the COHORT table|
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|cohort_initiation_date|No|Date|A date to indicate when the Cohort was instantiated in the COHORT table|
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### Conventions
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* The cohort_definition_syntax does not prescribe any specific syntax or programming language. Typically, it would be any flavor SQL, a cohort definition language, or a free-text description of the algorithm.
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