rfc implementation question

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Author: der.hans
Date:  
Subject: rfc implementation question
moin, moin,

research the RAND stuff from W3C,
http://www.w3.org/TR/2001/WD-patent-policy-20010816/ and I see 4.(a).1.2.1
which states "portions of an implementation that are not required by the
Recommendation".

How does that relate to becoming potentially necessary? For instance, say
there were some non-required part of kerberos that some vendor decided to
implement. Say that they not only implement it, but require it in order to
work with their implementation of the standard. If that new part that is
being used is truly non-required ( not saying any cases that might resemble
this example involved truly non-required specs ), then they're
implementation can't require that part of the spec in order to function. At
least that's how I'd interpret non-required.

Another example might be a pop protocol that also allows ssh. If the ssh
portion of the standard were non-required, then implementations of the
standard couldn't require ssh in order to use the service. Doesn't mean
sys_adm can't turn off the non-secure pop mechanism. Should it?

ciao,

der.hans
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