The Sun Master Index Environments define the deployment environment of the master index application, including the domain, application server, external systems, and so on. If master index client projects use the same Environment, it might also include a JMS IQ Manager, constants, Web Connectors, and External Systems. Each Environment represents a unit of software that implements one or more master index applications. You must define and configure at least one Environment for the master index application before you can deploy the application. The application server hosting the master index application is configured within the Environment in NetBeans.