Observational Health Data Sciences and Informatics

CDM_SOURCE table

THIS IS OUTDATED. All documentation is now on the github wiki. Please refer there or to the CDM working group for more information

The CDM_SOURCE table contains detail about the source database and the process used to transform the data into the OMOP Common Data Model.

Field	Required	Type	Description
cdm_source_name	Yes	varchar(255)	The full name of the source
cdm_source_abbreviation	No	varchar(25)	An abbreviation of the name
cdm_holder	No	varchar(255)	The name of the organization responsible for the development of the CDM instance
source_description	No	CLOB	A description of the source data origin and purpose for collection. The description may contain a summary of the period of time that is expected to be covered by this dataset.
source_documentation_reference	No	varchar(255)	URL or other external reference to location of source documentation
cdm_etl _reference	No	varchar(255)	URL or other external reference to location of ETL specification documentation and ETL source code
source_release_date	No	date	The date for which the source data are most current, such as the last day of data capture
cdm_release_date	No	date	The date when the CDM was instantiated
cdm_version	No	varchar(10)	The version of CDM used
vocabulary_version	No	varchar(20)	The version of the vocabulary used

If a source database is derived from multiple data feeds, the integration of those disparate sources is expected to be documented in the ETL specifications. The source information on each of the databases can be represented as separate records in the CDM_SOURCE table.
Currently, there is no mechanism to link individual records in the CDM tables to their source record in the CDM_SOURCE table.
The version of the vocabulary can be obtained from the vocabulary_name field in the VOCABULARY table for the record where vocabulary_id='None'.