====== Cohort Definition Workgroup (Circe) ======

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**Objective:** The objective of this workgroup (WG) is to implement an open-source, web-based application that provides a consistent UI allowing user-defined population criteria that can be shared across a network of Common Data Model databases.  This application has 3 main components: a criteria syntax, a UI for gathering user input, and a translation layer which converts the criteria syntax into the CDM-specific queries.

The target CDM version is CDM5, with a planned release in early 2015.

**Project Lead:**  [[http://ohdsi.org/who-we-are/collaborators/christopher-knoll/|Christopher Knoll]]

**Start Date:** 6/10/2014

**Repository:**  [[https://github.com/OHDSI/Circe]]

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==== Meetings ====

Schedule: Every other Thursday starting from December 11th, 2014

Call in Number: 1-877-565-9999 (US)

Attendee access code: 536 106 50 

[[https://www.google.com/url?q=https%3A%2F%2Fwww.jjconferencing.com%2Fjj%2Fglobalaccess%2F&usd=2&usg=AFQjCNFixyJbwvDIv0Qj_ac1-IznKtLWMw|Show global numbers]]

WebEx: [[https://jjconferencing.webex.com/jjconferencing/j.php?J=740979963]]


=== Development Status (as of 12/11/2014) ===
Currently have as working mock-up that is being evaluated for functional requirement gaps.

Once the requirements analysis is complete, a final implementation will be built.  This final implementation will have a fully-defined criteria syntax, which will lead us to the final objective: translating the criteria expression into SQL.


=== GitHub Issues ===

[[https://github.com/OHDSI/Circe/issues]]