Christopher,
Just to update this thread. I am still trying to find an old project in our system (in archive) to see if we have an example. There is a particular project from our old archives that may have the syntax. I can't believe this syntax was not expose in any of our documentation.
My colleagues and/or dev/consultant team may also need to dig deep in 10 year old examples. In zip file storage or subversion or in hard drives stored in somewhere. It may be in our very old online area but was deactivated. I'll try to find if it got migrated to the new area.
Regards,
Mark Pe
SAP Platinum Support Engineer