OMOP/Documentation/CommonDataModel_Wiki_Files/StandardizedMetadata/Standardized-Metadata.md

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[CDM_SOURCE](https://github.com/OHDSI/CommonDataModel/wiki/CDM_SOURCE)
All metadata about the data should be derived from the data themselves. However, the following contains a few key pieces of information that are convenient especially for software applications utilizing the CDM data.
Below provides an entity-relationship diagram highlighting the tables within the Standardized Metadata portion of the OMOP Common Data Model:
![Metadata entity-relationship diagram](http://www.ohdsi.org/web/wiki/lib/exe/fetch.php?media=documentation:cdm:standard_meta_data.png)\