More manifest entries?

[David Jencks]

I just noticed some other projects include more info in the jar  
manifests about their provenance using something like this:

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <configuration>
          <archive>
            <index>true</index>
            <compress>true</compress>
            <manifestEntries>
              <Implementation-Vendor>Apache Software Foundation</ 
Implementation-Vendor>
              <Implementation-Vendor-Id>org.apache</Implementation- 
Vendor-Id>

              <Package>org.apache.activeio</Package>
              <Extension-Name>${project.artifactId}</Extension-Name>
              <Implementation-Version>${project.version}</ 
Implementation-Version>

            </manifestEntries>
          </archive>
        </configuration>
      </plugin>


Would this be a good idea?  I guess we could pop something like this  
in the project pom.

Not sure whether or not I'll have time to play with this.

thanks
david jencks