#21: Mandatory Vs. Optional

 > Section 4.3.3
 >
 > "   The payload MUST support marking of mandatory and optional
 >    attributes, as well as an attribute used for rejecting mandatory
 >    attributes."
 >
 > Why is it necessary for mandatory and optional attributes to
 > be explicitly marked?  Is it be sufficient for the attributes
 > to be divided into standardized and vendor-specific spaces,
 > with the latter optional?
 >

-- 
Ticket URL: <http://wiki.tools.ietf.org/wg/emu/trac/ticket/21>
emu <http://tools.ietf.org/wg/emu/>

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