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--- documentation:software:circe [2014/12/03 14:22] – chrisknoll
+++ documentation:software:circe [2014/12/03 21:01] (current) – chrisknoll
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 ====== CIRCE ======
 CIRCE - Cohort Inclusion and Restriction Criteria Expression
 ===== Introduction =====
+When performing an analysis, usually the first step is to define the population of interest (also known as a cohort).  However, there is limited technology out there that makes it easy for a user to define populations based on user-specified criteria.  CIRCE provides a user interface for users to enter cohort criteria, persist them to storage, and generate the CDM v5 SQL queries.
 ==== Scope and purpose ====
+The scope of CIRCE is to enable a researcher to specify criteria that identifies a patient population within the Common Data Model (CDM).  The criteria available for cohort definition is directly mapped to the entity types found in the CDM v5: Person, Condition_occurrence, Condition_era, Drug_Occurrence, Drug_era, Procedure_occurrence, Observation, Visit, and Death.  By having a well-defined data-structure for capturing cohort definition criteria, definitions can be shared between CDM environments to do comparative analysis.
 ===== Installation and support =====
+=== Requirements ===
+  *Ensure that you have OHDSI Web API service installed in your environment. see https://github.com/OHDSI/WebAPI
 All source code and installation instructions available on Github: https://github.com/OHDSI/Circe
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-===== Application-specific sections about using the application functions =====
+===== User Guide =====