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<sys:environment> .. </sys:environment>: These elements provide the moduleid configuration and the dependencies. The moduleid elements provide the configuration name for the web module. So, when the web module is deployed, it is given the configuration name samples/samples/2.5/jar. The dependencies elements provide the configurations and third party libraries on which the web module is dependent on. These configurations and libraries will be available to the web module via a classloader hierarchy. In this case, the web module is dependent on samples/EmployeeDatasource/2.15/rar which is the configuration of the deployed Datasource that connects to a back end DB2 database. The Datasource deploys a database connection pool (javax.sql.Datasource) with name jdbc/EmployeeDatasource.

<sys:context-root> .. </sys:context-root> : The XML elements used to provide the web context root of the web applications.

{<naming:resource-ref> .. </naming:resource-ref>}} : These elements help us to configure the resource references. In this case, the datasource reference jdbc/DataSource is mapped to jdbc/EmployeeDatasource.

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