[DFDL-WG] Alternate Initiators?

Wed Feb 27 12:48:12 EST 2013

Consider the following IMF headers:

Message-ID: <CACQ76nh2VDypuwm1aHc1-s8ZmmyXg8XEosS6af6yurkVdT+8QQ at mail.gmail.com>
Message-Id: <208E8372-A9D9-468A-9B4B-BD97ED28F64C at garriss.org>

Notice the difference:

    Message-ID:
    vs
    Message-Id:

Per the RFC, only the first is legal, but both are used in practice, and we'd like to allow either.  In our DFDL schema, "Message-ID" is an initiator, but suddenly we have two alternate initiators for the same element.

How we model this in DFDL?

TIA
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