[ietf-dkim] ADSP 4.2.1. Record Syntax clarication

I wish to confirm if in 4.2.1. Record Syntax, it is possible  to have 
this syntax:

     dkim=discardable; <-- with the ending semi-colon delimiter?

I don't know if the ABNF implies this or the first statement regarding 
following 3.2 in 4871 is sufficient to suggest that the semi-colon and 
additional tags are possible:

It currently has defined:

     ABNF:
           adsp-dkim-tag = %x64.6b.69.6d *WSP "=" *WSP
                           ("unknown" / "all" / "discardable")

Should the ABNF be this instead?

     ABNF:
           adsp-dkim-tag = %x64.6b.69.6d *WSP "=" *WSP
                           ("unknown" / "all" / "discardable")[";"]

I ask just in case future updates or new new tags are added.  I wish 
to make sure the ADSP implementation do not fall trap to just checking 
the entire string so that is all that is currently defined.

Thanks

-- 
Sincerely

Hector Santos
http://www.santronics.com


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