[platform-vcm-dev] ProjectSets

[David Scott Corbin <dcorbin@xxxxxxxx>]

I'm getting a warning ("Element 'projectSet' is not legal as a child of 
element 'null'" AND "Element 'projectSet' is not legal in the enclosing 
extension point") for the following fragment of plugin.xml.  

<extension point="org.eclipse.team.core.projectSets">
                <projectSet  id="net.sourceforge.perforce.core.perforcenature" 
                        class="net.sourceforge.perforce.ui.internal.P4ProjectSetSerializer"/>
        </extension>

Can anybody explain these warnings? 

I'm not really familiar with ProjectSets.  Can anyone point me at some 
documentation, or explain them to me?

David
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