I've tried to follow the somewhat ambiguous instructions in the Help. These are the metatypes profile entries:

The toolbox entry is:
Test::Database(EAUML::Database)=MyDB
However, when I try to drag MyDB from the toolbox, I get:
"Missing base type 'Database' does not extend 'EAUML::Database'
Command: Test::Database(EAUML::Database)"
What am I doing wrong?
TIA,
Paolo
Database does not extend 'EAUML::Database', it (indirectly) extends 'UML::Package'. Try
Test::Database(UML::Package)=MyDB
or even
Test::Database=MyDB
Thanks Neil!
From previous (same) error messages in other toolbox contexts, I suspected it was a Toolbox profile problem, but as I've said before, still too new at this game.
Now Works! I get the «Test::Database» Package created from the toolbox!
Am I right in understanding that having extended (or NOT extended - as you indicate) EAUML::Database, I should be able to select my item and it will enable the Database Builder option on the context menu?
Semantically, if I haven't extended a non-UML metatype, but in fact, extended the base UML metatype, shouldn't Roy get to work fixing up the Help?

Finally, What I'm trying to achieve here is to allow us to have our own versions of standard Sparx EA MDG items - those that trigger specific functionality such as DB Modelling, BPMN, BPSim, DMN, etc. Such that they preserve that functionality, but give us the option of rendering in a standard way for our environment. Is this the mechanism to do that with?
Paolo