Provide the ability to globally exclude a dependency

Some dependencies you simply never want downloaded no matter what. For example, when using jdk 1.5 xml-apis.jar causes headaches. But many projects require this dependency.

Therefore it would be nice to support a 'never' download setting. Maybe:

<dependencyManagement>
<excludedDependencies>
<dependency>
<groupId>xml-apis</groupId>
<artifactId>xml-apis</artifactId>
</dependency>
</excludedDependencies>
</dependencyManagement>

(Or is there another way to do this now?)