Dynamic content selection and delivery

摘要

A system for selecting and delivering content items includes a primary system and a secondary system. Each system includes a server and a datastore of content items that is accessible by the server. The primary system receives a request for a content item, selects an appropriate content item from the primary datastore, and sends a query containing information regarding the selected content item to the secondary system. The secondary system receives the query, searches the secondary datastore, and determines whether to deliver the content item contained in the query, another content item, a default content item, or a pass-back to the requestor.