Every Subproceso de Arbortext PE contains a Java object called the Aplicación Arbortext PE Context. The Aplicación Arbortext PE Context is responsible for loading and executing Aplicación Arbortext PEs upon request from the Arbortext PE Request Manager. The Aplicación Arbortext PE Context starts when the Subproceso de Arbortext PE launches. Before the Arbortext PE Request Manager asks an Subproceso de Arbortext PE to run an Aplicación Arbortext PE, the Arbortext PE Request Manager passes parameter information to the Aplicación Arbortext PE Context. The parameter information includes all global parameters defined in e3config.xml, plus all of the parameters defined for the Subproceso de Arbortext PE pool in which the Subproceso de Arbortext PE will run.

The Aplicación Arbortext PE Context stores the parameter information it receives from the Arbortext PE Request Manager in an object called the Application Configuration. An instance of this object, which implements the Java class com.arbortext.e3.E3ApplicationConfig, is passed to the init method of every Aplicación Arbortext PE written in Java. The information is also available to JavaScript, VBScript, and ACL applications, as described in later sections.