From bf39b90e3bcc7c065f61efc6297b5ad42309260b Mon Sep 17 00:00:00 2001 From: Christian Reich Date: Tue, 7 Feb 2017 14:02:42 -0500 Subject: [PATCH] Added Version logic --- README.md | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index be50412..bd2725b 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,9 @@ Common-Data-Model ================= -See full CDM specification file on our [Wiki](http://www.ohdsi.org/web/wiki/doku.php?id=documentation:cdm:single-page) or in the [CDM V5 PDF](https://github.com/OHDSI/CommonDataModel/blob/master/OMOP%20CDM%20v5.pdf) +This repo contains the definition of the OMOP Common Data Model. It supports the 4 SQL technologies: Impala, Oracle, Postgres and SQL Server. For each, the DDL, constraints and indexes (if appropirate) are defined. + +Versions are defined using tagging and versioning. Full versions (V6, 7 etc.) are released irregularly after a major strategy change or use case coverage. It will be issued during an OHDSI Symposium. Major version (V5.1, 5.2 etc.) are released half yearly (1-Jul and 1-Jan). Those versions are not guaranteed to be backward compatible. Minor versions (V5.1.1, V5.1.2 etc.) are released irregularly and often, and contain small hot fixes or backward compatible changes to the last Major Version. + + +See full CDM specification file on our [Wiki](http://www.ohdsi.org/web/wiki/doku.php?id=documentation:cdm:single-page).