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.
Relationships of semantic model layers. The threelayers of the semantic model include Layer II: information model, Layer III: semantic metadata and Layer IV: controlled terminologies. The figure illustrates two information systems using different class and attribute names, but annotating these UMLentities with the same concept. The resulting CDE will be shared between systems.
