[uf-new] Re: hAudio rel-enclosure & linking issues
andy at pigsonthewing.org.uk
Fri Jan 11 13:00:05 PST 2008
In message <1200070018.3565.26.camel at localhost.localdomain>, Martin
McEvoy <martin at weborganics.co.uk> writes
>> It would also seem to be inadvisable to use rel="enclosure" for links to
>> off-site files.
>Please can you explain a little further why you have an issue with
If I set an agent to cache:
which linked to:
I would expect it to cache the former, but not the latter; any more than
I would expect the agent, set to cache:
to cache all the myriad pages linked to from there.
>It seems sound enough to me :) I have found more often than not that a
>purchased audio track is rarely downloaded from the website you
>actually buy the track from.
If site "A" acts as an agent for site "B", you would not expect a cached
version of "A" to include all of the content from "B". The content is
not "cacheable", and thus outside the scope of rel-enclosure.
Not least if "A" is McEvoy's hobby pages and "B" is MegaCorp Records!
>rel="encloseure" simply means that the hyperlink destination is
>something that can be downloaded or cached?
No; as I indicated previously:
By adding rel="enclosure" to a hyperlink, a page indicates that
the destination of that hyperlink is intended to be downloaded
I take that to mean that the "enclosure" is an intrinsic part of the
document represented by the page; you would expect to find them
Otherwise, why not mark up every href as an enclosure?
I think we need three classes; say:
for direct links to .mp3 or .wav files, etc.
for direct links to .ram files, etc.
for links to .html files, etc., which link in turn to one of the
In the use case:
User issues instruction to a user-agent to "scan pages until you
find one which discusses Beethoven's 'Clair de Lune', then find
me a downloadable version so I can put it on my pocket device".
the agent should ignore the second type, and use the first or third to
find an mp3 or wav.
If rel-license becomes part of hAudio (a no-brainer, surely?), along
with "type", then the use case could include "find me a
freely-downloadable mp3 version..."
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