DIME Message Index

Has there been any discussion in this or other forums about about a
standard index payload format for cross referencing a DIME message?

I'm envisioning a payload near the front of the message that contains
the payload type, ID, and length for each of the payloads within the
message.

This would allow an implementor to retrieve the index payload, and then
directly seek (perhaps via HTTP Range Requests) to the desired payloads.

If anyone is interested, I can quickly write up an I-D about this.

Thanks,

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Justin Chapweske, Onion Networks
http://onionnetworks.com/