Re: [urn] Feedback on draft-ietf-urnbis-rfc2141bis-urn-16

["Svensson, Lars" <[e-mail]>]

Julian, all

On Saturday, January 07, 2017 10:58 PM, urn [mailto:[e-mail]] On Behalf Of Julian Reschke wrote:

> >>>    For the sake of consistency with RFC 3986, neither the
> >>>    general syntax nor the semantics of q-components are
> >>>    defined by, or dependent on, the namespace of the URN.  In
> >>>    parallel with RFC 3896, specifics of syntax and semantics,
> >>>    e.g., which keywords or terms are meaningful, of course
> >>>    may depend on a particular namespace or even a particular
> >>>    resource.
> >>>
> >>> I agree that this is the right thing to do, but I'm not sure
> >>> what this has to do with 3986.  3986 allows a scheme to
> >>> mandate a specific syntax, no?
> >
> > Yes, at least as I read it.   But, IIR, there have been some
> > claims that 3986 does not obviously allow a scheme to delegate
> > the syntax to other (non-scheme) parts of the URI (specifically
> > a namespace in the urn scheme case).   At this point, I would
> > personally prefer sentences to the effect of "no matter what you
> > think 3986 says, URNs works this way...", but I don't think that
> > a proposal like that would be constructive or helpful.   If you
> > think this is important and want to propose alternate text,
> > please do so.
> > ...
> 
> So we agree on what RFC 3986 says :-). I think the right conclusion is
> to strip the prose wrt RFC 3986. Just say:
> 
> "Neither the general syntax nor the semantics of q-components are
> defined by, or dependent on, the namespace of the URN.  Specifics of
> syntax and semantics, e.g., which keywords or terms are meaningful, of
> course may depend on a particular namespace or even a particular
> resource."

Since the q-component is always passed directly to the resource representation returned by the URN resolver, I'd say that any syntactical and semantic constraints of the q-component depends _entirely_ on that resource representation. My suggestion would be to strip references to the URN namespace, too:

[[
Neither the general syntax, nor the semantics of q-components are defined or dependent on the namespace of the URN. Specifics of syntax and semantics, e. g., which keywords or terms are meaningful, depend entirely on the particular resource representation.
]]

Best,

Lars