[ietf-dkim] Clarification needed for "Computing the Message Hashes"

HI!

I wondered about a sentence in section 3.7. of RFC 4871:

   [..] The header field MUST be presented to
   the hash algorithm after the body of the message rather than with the
   rest of the header fields and [..]

http://www.dkim.org/specs/rfc4871-dkimbase.html#hashing

What does "the body of the message" mean exactly? The 1. body-hash or really
2. the whole message body (again)?

The more formal description implies 1.:

    body-hash = hash-alg(canon_body)
    header-hash = hash-alg(canon_header || DKIM-SIG)
    signature = sig-alg(header-hash, key)

Ciao, Michael.
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