Thanks Michael,
This is useful to know. Many people have misunderstood
SHOULD including myself !!
>>3. SHOULD This word, or the adjective "RECOMMENDED", mean that there
>> may exist valid reasons in particular circumstances to ignore a
>> particular item, but the full implications must be understood and
>> carefully weighed before choosing a different course.
I'm really not sneering or anything but maybe the SHOULD
description MUST include a sentence saying:
"there may exist valid reasons in particular circumstances to use a
SHOULD instead of MUST, but the full implications must be understood
and carefully weighed before doing so.
Regards,
Attila
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Procter
Sent: 18 July 2008 16:07
To: Iñaki Baz Castillo
Cc: [email protected]
Subject: Re: [Sip-implementors] Setting anonymous From
On Fri, July 18, 2008 12:30 pm, Iñaki Baz Castillo wrote:
> Yes, too much SHOULD in the RFC3261. :(
This keeps coming up (and I'm not just picking on you!). People assume that
'SHOULD' means the same as the English word 'should'. In fact,
RFC2119 defines SHOULD like this:
3. SHOULD This word, or the adjective "RECOMMENDED", mean that there
may exist valid reasons in particular circumstances to ignore a
particular item, but the full implications must be understood and
carefully weighed before choosing a different course.
If more people read that and thought about the 'full implications' and
'carefully weighed' them, the world would be a happier place!
I think RjS summarised it once[0] as 'SHOULD means MUST, unless you have a
really really good reason', which seems like a useful way to remember it.
Michael
[0] I may have misremembered the exact wording, but I hope I have captured the
essence correctly.
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