tools placing it in the repository. Valid values are: {@code none} (default),
            {@code converted} (repository manager converted this from an Maven 1 POM),
            {@code partner}
            (directly synced from a partner Maven 2 repository), {@code deployed} (was deployed from a Maven 2
            instance), {@code verified} (has been hand verified as correct and final).
          </description>

 maven.multiproject.includes property.
 2. it works without problems only for projects with relative paths, e.g., from
 one CVS repository.. for projects from multiple SCM repositories it's harder
 to maintain the same relative links on all developer computers.
 not sure the unified source directory structure addresses this issue.

 Properties

 maven.user.config.dir (system,default=${user.home}/.m2)