envelope test syntax?

The envelope test syntax in RFC3028 is given as:

  Syntax:   envelope [COMPARATOR] [ADDRESS-PART] [MATCH-TYPE]
            <envelope-part: string-list> <key-list: string-list>

But that is different than the address test syntax:

  Syntax:   address [ADDRESS-PART] [COMPARATOR] [MATCH-TYPE]
            <header-list: string-list> <key-list: string-list>

[COMPARATOR] and [ADDRESS-PART] being switched, which seems odd for a tests 
that are so similar.
The example for the envelope test uses the same syntax as the address test.

What is the correct syntax for the envelope test? Either the example is 
wrong, or the syntax definition is wrong.
--
Cyrus Daboo