Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A Unified Modeling Language (UML) Class Diagram describing CDE content. The key classes tables from the perspective of element use are Concepts, Value Domains, Data Elements and Choices. The classes are implemented as relational tables: in each class, the symbols ≪PK≫ and ≪FK≫ indicate primary and foreign keys, respectively.
