Name of source project for copying of artifact(s). May contain references to build parameters like $PARAM.

To copy from a particular module of a Maven project, enter JOBNAME/MODULENAME as seen in the URL for that module when browsing Hudson. Example: MyMavenJob/MyModule

To copy from a particular configuration of a multiconfiguration (matrix) project, enter JOBNAME/AXIS=VALUE,.. as seen in the URL for that configuration. Example: MyMatrixJob/jdk=Java6u17
To copy artifacts from one matrix project to another, use a parameter to select the matching configuration in the source project. Example: OtherMatrixJob/jdk=$jdk