Finding out globals, their structure and contents

Hi,
When you connect to a GT.M database you don't know, how
can you
- get the "catalog" of the globals this DB contains,
- list their contents ?

Sorry to compare with Oracle once again but, with this DBMS
you can get the list of a schema's tables with
SQL> select table_name from all_tables where owner=3D'<schema>'

and see the contents of these tables with
SQL> select * from schema.<table_name>;
("<table_name>" being every value the previous query returned you)

Is there a notion of schema/owner of globas in GT.M ? If yes how
(once again) can you list them ?

In advance, *thanks*...
Regards,
S=E9bastien