A computer labeled Visual Design Tools sits at the top of the figure. An arrow connects this computer to a box below labeled Oracle9iAS Infrastructure. Inside Oracle9iAS Infrastructure are a box labeled Metadata and a box labeled Advanced Queuing.

On either side of Oracle9iAS Infrastructure are boxes labeled Adapter. Each Adapter box has an arrow connecting to the Metadata box and Advanced Queuing box inside Oracle9iAS Infrastructure. The Adapter box to the left of Oracle9iAS Infrastructure connects to a box labeled App1. The Adapter box to the right of Oracle9iAS Infrastructure connects to a box labeled App2.

The arrow connecting the left Adapter box to the Metadata box inside the Oracle9iAS Infrastructure box says XML.