The master-level build script you run in the \bin directory of your installed Asset Build Environment environment as described in Running the Build Script and Rebuilding the Index. Use this build script for standard use in a defined deployment environment.

The project-level build script, in which the build script is run in a process project directory. Running this build script is useful because process project directories can be located anywhere in a user’s file system (that is, outside the deployment environment). This approach enables you to create the composite and descriptor files in any process project directory, regardless of location. After the composites and descriptors are built, they can be moved or copied into a deployment repository and indexed by the build script in order to make them available to Deployer. Project-level build script behavior is governed by the build.xml file in the process project directory. For information about configuring the build.xml file, see Configuring the Process Project build.xml File.