The Arbortext PE Request Manager ships with several Dynamic Components installed, including request selectors, a cache manager, a queue manager, and request handlers. While they are distributed as part of Arbortext Publishing Engine, they are built entirely from public interfaces. They are loaded dynamically by the Arbortext PE Request Manager as specified in the e3config.xml configuration file. You can safely delete from e3config.xml any Dynamic Components that you do not need. If you do that, however, keep a backup copy of the distributed e3config.xml file in case you implement one or more of them later.