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Status: Verified (8)

RFC 2119, "Key words for use in RFCs to Indicate Requirement Levels", March 1997

Note: This RFC has been updated by RFC 8174

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: gen

Errata ID: 493
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Davidson, Malcolm
Date Reported: 2001-05-31

Section 1 says:

2. MUST NOT   This phrase, or the phrase "SHALL NOT", mean that the
   definition is an absolute prohibition of the specification.

It should say:

2. MUST NOT   This phrase, or the phrase "SHALL NOT", means that the
   definition is an absolute prohibition of the specification.

Errata ID: 495
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Davidson, Malcolm
Date Reported: 2001-05-31

Section 1 says:

1. MUST   This word, or the terms "REQUIRED" or "SHALL", mean that the
   definition is an absolute requirement of the specification.


It should say:

1. MUST   This word, or the terms "REQUIRED" or "SHALL", means that the
   definition is an absolute requirement of the specification.

Notes:


Errata ID: 496
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Kurt Zeilenga
Date Reported: 2001-01-31

Section 6 says:

   In particular, they MUST only be used where it is actually required
   for interoperation or to limit behavior which has potential for
   causing harm (e.g., limiting retransmisssions)  For example, they
   must not be used to try to impose a particular method on
   implementors where the method is not required for interoperability.   

It should say:

   In particular, they MUST only be used where it is actually required
   for interoperation or to limit behavior which has potential for
   causing harm (e.g., limiting retransmissions).  For example, they
   must not be used to try to impose a particular method on
   implementors where the method is not required for interoperability.

Errata ID: 498
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Davidson, Malcolm
Date Reported: 2001-05-31

Section 1 says:

4. SHOULD NOT   This phrase, or the phrase "NOT RECOMMENDED" mean that
   there may exist valid reasons in particular circumstances when the
   particular behavior is acceptable or even useful, but the full
   implications should be understood and the case carefully weighed
   before implementing any behavior described with this label.

It should say:

4. SHOULD NOT   This phrase, or the phrase "NOT RECOMMENDED", means that
   there may exist valid reasons in particular circumstances when the
   particular behavior is acceptable or even useful, but the full
   implications should be understood and the case carefully weighed
   before implementing any behavior described with this label.

Errata ID: 500
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Davidson, Malcolm
Date Reported: 2001-05-31

Section 1 says:

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.

It should say:

3. SHOULD   This word, or the adjective "RECOMMENDED", means 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.

Errata ID: 494
Status: Verified
Type: Editorial
Publication Format(s) : TEXT

Reported By: Davidson, Malcolm
Date Reported: 2001-05-31
Verifier Name: RFC Editor
Date Verified: 2007-11-07

Section 6 says:

(e.g., limiting retransmisssions)

It should say:

(e.g., limiting retransmissions)

Errata ID: 499
Status: Verified
Type: Editorial
Publication Format(s) : TEXT

Reported By: Anders Langmyr
Date Reported: 2006-01-09
Verifier Name: Peter Saint-Andre
Date Verified: 2011-11-15

Section Abstract says:

       The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
       NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and
       "OPTIONAL" in this document are to be interpreted as described in
       RFC 2119.

It should say:

       The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
       NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT 
       RECOMMENDED",  "MAY", and "OPTIONAL" in this document are to 
       be interpreted as described in RFC 2119.

Notes:

The phrase "NOT RECOMMENDED" is missing from this sentence.

Errata ID: 5101
Status: Verified
Type: Editorial
Publication Format(s) : TEXT

Reported By: Jim Tonti
Date Reported: 2017-08-29
Verifier Name: Warren Kumari
Date Verified: 2017-08-29

Section 5 says:

5. MAY   This word, or the adjective "OPTIONAL", mean that an item is
   truly optional.  One vendor may choose to include the item because a
   particular marketplace requires it or because the vendor feels that
   it enhances the product while another vendor may omit the same item.
   An implementation which does not include a particular option MUST be
   prepared to interoperate with another implementation which does
   include the option, though perhaps with reduced functionality. In the
   same vein an implementation which does include a particular option
   MUST be prepared to interoperate with another implementation which
   does not include the option (except, of course, for the feature the
   option provides.)

It should say:

5. MAY   This word, or the adjective "OPTIONAL", mean that an item is
   truly optional.  One vendor may choose to include the item because a
   particular marketplace requires it or because the vendor feels that
   it enhances the product while another vendor may omit the same item.
   An implementation which does not include a particular option MUST be
   prepared to interoperate with another implementation which does
   include the option, though perhaps with reduced functionality. In the
   same vein an implementation which does include a particular option
   MUST be prepared to interoperate with another implementation which
   does not include the option (except, of course, for the feature the
   option provides).

Notes:

Full stop should appear outside the parentheses in the last sentence.

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