The data model supports a definition that the package's extra properties will adhere to, but the descriptor does not allow it to be indicated. The descriptor should be updated to allow this to optionally be specified.
This bug was previously known as http://jira.rhq-project.org/browse/RHQ-565
mass move to component = core server
mazz, is this still relevant?
We don't use or need this (yet) so even if we implemented it, we wouldn't use it anywhere. But technically, this is still valid. We can probably close this - if we do need this in the future, we can re-submit.