_Structure_annotation.DB_source_release_date
| Description | Date the database from which the structure annotation was extracted released their data to the public. |
| Details: | |
| Parent saveframe | structure_annotation |
| Data type | yyyy-mm-dd |
| DB table | Structure_annotation |
| DB column | DB_source_release_date |
| DB type | DATETIME year to day |
| NULL allowed | yes |