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.
The complex subtype contains the all subtypes except for the A, B and C subtypes. When the same data contained different subtypes, it was assigned to different subtypes according to weight.
