DATA_SOURCE

The DATA SOURCE table records metadata about external data sets.

Field	Required	Type	Description
data_source_id	Yes	varchar(100)	A unique string identifier. Similar pattern of 'vocabulary_id'
data_source_name	Yes	varchar(255)	The name of the data source
data_source_description	No	varchar(max)	A short description of the data source.
data_source_type_id	Yes	varchar(255)	(TODO) A foreign key to a Standard Concept ID of the type of data source
data_source_type_name	Yes	varchar(255)	Text representation of type
document_url	No	varchar(100)	A link to documentation for the data source.
source_version	No	varchar(50)	Specifies which version or release of the source data was used.
collection_start_date	No	date	The date the data started being collected.
collection_end_date	No	date	The date the data ended being collected.
timeframe_concept_id	No	integer	A foreign key to a Standard Concept ID of time intervals in the Standardized Vocabularies. Used in conjunction with timeframe_value to specify the length of time the data represents.
timeframe_name	No	varchar(100)	text representation of timeframe. 'Year', 'Month', etc.
timeframe_value	No	float	A numeric qualifier used in conjunction with timeframe_concept_id to specify the length of time the data represents.
last_updated_date	No	date	The date of the last edit of the data set