A data repository monitoring system that utilizes queries to generate notifications in response to the identification of new and changed content. The system includes a monitoring component that monitors a plurality of disparate repositories in order to identify the receipt of new or modified content. The monitoring component includes a query component(s) that identifies metadata of imported content. The query can be generated and communicated to the monitoring component via a graphical user interface. A notification component is also provided to generate a prompt upon the receipt of incoming content as identified by the query component. The invention employs a centralized store (e.g., change queue) that maintains metadata corresponding to imported (e.g., new) metadata.