Maven POM files
This sample consists of four Maven pom.xml files--the top-level pom.xml and one pom.xml file for each of the three submodules. Because they specify the top-level pom as their parent, the latter three all inherit the configuration information in the top-level pom.xml file. Also, because the top-level pom explicitly references each of this submodules, those submodules are processed while running most Maven commands (such as mvn clean install or mvn eclipse:eclipse) from the project base directory. We'll explore this project's pom.xml files in this section.Top-level pom.xml