Chris Sizemore wrote:
yes, i agree that TV-Anytime supplies some of the requirement (indeed,
perhaps everything brian was suggesting... brian?)
but does TVA, despite the URN (the crid, i.e.
crid://my.id.creator/xxxxxxxxxxx88r; http://en.wikipedia.org/wiki/Crid),
supply the "on the Web" part?
depending on one's philosophical bent, that's one of the potential
problems with URNs & thus CRIDs: they can't (easily) be dereferenced, in
the way that a "regular old" URL can be... URNs aren't "on the Web"...
There's some confusion over CRIDs IMO - even in RFC 4078 they get
referred to as URLs. I think it's best to think of them as URIs,
designed to be unique and location-independent. TV-Anytime defines the
concept of a CRI service that (amongst other things) provides mappings
between CRIDs and locators, which could include http, rtsp etc *URLs*.
This gives you the benefits of both time-invariant identifiers and
time-varying locators, at the cost of an extra lookup.
S
PS First post to the list, so I should probably explain who I am - I
work for BBC Research at Kingswood Warren, on a self-explanatory project
called Beyond HD, and on various other things, including some internetty
stuff. Until recently I was working on a project to try and iron the
kinks out of providing TV-Anytime compliant metadata via DVB, so I know
my way around the standard, but don't consider myself to be an expert.
Prod Andrew McParland if you want one of those. ;-) I worked on the
"WiiPG" demonstrator that Matt Cashmore posted to the list recently - a
fine result from our entirely unofficial Lunchtime Research Programme...
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