Maybe adding the /recursive=1 qualifier will give you what you want. If so, please click the checkmark to accept this answer.

SAMPLES>d $system.OBJ.Export("Cinema.Film.cls","c:\s\exp1.xml")                  
Exporting to XML started on 04/13/2017 09:49:36
Exporting class: Cinema.Film
Export finished successfully.
 
SAMPLES>d $system.OBJ.Export("Cinema.Film.cls","c:\s\exp2.xml","/recursive=1")   
Exporting to XML started on 04/13/2017 09:49:39
Exporting class: Cinema.Duration
Exporting class: Cinema.Film
Exporting class: Cinema.FilmCategory
Export finished successfully.
 
SAMPLES>

Is there a fault with the Unsubscribe link in the emails? Here's one I received:

The highlighted link's URL is https://community.intersystems.com/user//subscriptions/node#edit-0-check... and when I click on it I get a new browser tab at the following URL:

https://community.intersystems.com/user/john-murray#edit-0-checkboxes-42...

The page looks like this:

Was it supposed to take me somewhere on the Subscriptions tab?

I think you meant to write that you changed the group and tag from Caché to Developer Community. I assume you did this because my original posting on the Caché group and tag was not sufficient to make it crosspost to the Google Group. I guess there is some human involvement in the crossposting, and this filtered my posting out.

Fabian, thank you for posting my original onto the group [Update: 3-Apr-2017 I can no longer find Fabian's post there sad]