RSVP message
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... Message Type is an 8-bit number that identifies the function of the
RSVP message. Values from 0 through 239 are to be assigned by
Standards Action. Values from 240 through 255 are to be assigned by
Expert Review.
...
... Each class of data objects in an RSVP message is identified by an all
upper-case Class Name and an 8-bit ...
