Re: [urn] normative language -- a new convention
Ted Hardie <ted.ietf@gmail.com> Fri, 18 May 2012 15:33 UTC
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Date: Fri, 18 May 2012 08:33:34 -0700
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From: Ted Hardie <ted.ietf@gmail.com>
To: Alfred HÎnes <ah@tr-sys.de>
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Subject: Re: [urn] normative language -- a new convention
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Howdy, I am quite concerned about the convention proposed. Using case to distinguish the origin of a requirement seems to me a very fragile method compared to simply quoting the appropriate standard in its existing language. Consider, for example, the use of a screen reader by a developer; I am not confident that it would preserve this signal. regards, Ted Hardie On Fri, May 18, 2012 at 1:33 AM, Alfred HÎnes <ah@tr-sys.de> wrote: > <speaking both as an individual and as a co-chair> > > > With URN Namespace registration documents, we have the recurring > issue of choosing the appropriate normative language to indicate > requirements imposed by the document itself and those imposed by > external standards/documents for the underlying namespace, and to > distinguish these from the common form of the plain verbs as used > in natural language. > > With the approval of the IESG, RFC 6329 (published in April 2012) > has introduced a new convention (see Section 3 of that RFC), and > I suggest that we liberally adopt this method for our WG documents: > > - RFC 2119 terms (in all capital letters) denote normative document > requirements according to RFC 2119, which MUST be at a protocol > or meta-protocol level and conformance to these terms needs to be > verifiable from external behavior of the protocol entities. > > - The lowercase forms with initial capital: "Must", "Must Not", > "Shall", "Shall Not", "Should", "Should Not", "May", and "Optional" > are to be interpreted as quotations of external normative > requirements posed by other SDOs (in particular, ISO, in our > current cases of bibliographic URN Namespaces). > > - The all-lowercase forms still carry their natural language meaning. > > It is regarded good practice by some folks to avoid these lowercase > forms, but opinions on that advice differ largely. Note that the > former RFC Editor, Bob Braden -- who once, as the editor of STD 3 > (RFCs 1122 and 1123) had introduced the systematical use of these > all-uppercase terms into the Internet Standard document set --, > once stated that the proportion of non-capitalized to capitalized > "must"/"should"/"may" is one kind of quality scale for RFCs. > > It should be recalled that Section 6 of RFC 2119 literally says about > the capitalized forms: > > "Imperatives of the type defined in this memo must be used with care > and sparingly. 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." > > > Kind regards, > Alfred. > > -- > > +------------------------+--------------------------------------------+ > | TR-Sys Alfred Hoenes | Alfred Hoenes Dipl.-Math., Dipl.-Phys. | > | Gerlinger Strasse 12 | Phone: (+49)7156/9635-0, Fax: -18 | > | D-71254 Ditzingen | E-Mail: ah@TR-Sys.de | > +------------------------+--------------------------------------------+ > > _______________________________________________ > urn mailing list > urn@ietf.org > https://www.ietf.org/mailman/listinfo/urn
- [urn] normative language -- a new convention Alfred Hönes
- Re: [urn] normative language -- a new convention Ted Hardie
- Re: [urn] normative language -- a new convention Barry Leiba
- Re: [urn] normative language -- a new convention Alfred Hönes
- Re: [urn] normative language -- a new convention Barry Leiba