Re: [urn] new draft 10 - new form (RE: new draft 9 - RE: new urn PWID draft (7) with corrections)

["Henry S. Thompson" <[e-mail]>]

I continue to be confused by various aspects of this proposal.

First confusion (more to follow):

The fourth constituent of a PWID, the *precision-spec*, now has only two
possible values, 'part' and 'page', which appear to be attempting to
distinguish between, respectively,

 1) the representation that is/was retrievable for the archived-uri as
    at the archival-time;

 2) a (Content-type conformant?) rendering of that representation
    (with all other digital objects implicated in that rendering
    (e.g. scripts, stylesheets, icons, graphics, fonts, ..., to say
    nothing of advertisements) being also retrieved from the same
    archive?  As it the same archival-time?).  Let's just say I can't
    imagine any creator of a PWID having any idea of when they are
    supposed to use which, or any consumer of one to have any idea of
    what they are meant to do as a consequence of which is present.

Or is 'page' to be understood as meaning that the PWID as a whole is
meant by its minter to denote the same resource (in the RFC 3986 sense
of the word) that the archived URI denoted at the time of archiving?

The discussion of the use of 'page' in the worked example in the
*Resolution* section seems to support either interpretation.

It would help if a more detailed description of what the successful
resolution of the example PWID, that is

  urn:pwid:archive.org:2016-01-22T10:08:23Z:page:https://www.dr.dk

would look like.  Per RFC3986, this should be a representation of the
resource identified by the example PWID.

And, how would that be different if the example PWID had been

  urn:pwid:archive.org:2016-01-22T10:08:23Z:part:https://www.dr.dk

?

How does this distinction survive a change of media type?  To image/png,
or application/pdf, or audio/ogg?

ht
-- 
       Henry S. Thompson, School of Informatics, University of Edinburgh
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