Docbook-man: command with sub commands?

[ольга крыжановская <olga.kryzhanovska@gmail.com>]

I hope this is the right place to ask (after seeing some Docbook man
questions coming through):
How can I express sub commands in Docbook man pages, for example I
like to write a myfs(1M) manual page, where command myfs has several
sub commands:

       myfs create [-s] [-b blocksize] [[-o property=value]]... -V size volume

       myfs destroy [-rRf] filesystem|volume|snapshot

How would the syntax for these 2 look alike?

Olga
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