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.
Roles of the extensible components in the architecture of Pierre. Arrows indicate steps for submitting a query. Context Help Information and External Information Source represent documents that can be referenced by the query service. Spheres with slots indicate interfaces that can be implemented by developers. The Pierre Service and AQO objects are part of the core architecture and are not configurable by developers.
