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RSS suitable for date/time relative material ?   Message List  
Reply | Forward Message #1175 of 4640 |
RE: [syndication] RSS suitable for date/time relative material ?

Howdy,

RSS is perfect for your purposes. Unfortunately you're right, 0.9x do not
currently have a per-item date/time element. It's exactly the problems
you're encountering (overloading existing title or description elements)
that led to RSS 1.0's modular extensibility.

RSS 1.0[1] allows you to either supply such information using one of the
existing modules (Dublin Core[2] seems apropos) or via your own ad hoc
modular extension.

You could:

a) Use the Dublin Core "date" element to represent the date
of publication or broadcast; there's no restriction against
this date being in the future[3].

<dc:date>2001-01-01T12:00+00:00</dc:date>

(That's January 1st, 2001 at 12:00 noon GMT.)

or

b) Create your own ad-hoc extension(s), something like this:

<broadcast:date>2001-01-01</broadcast:date>
<broadcast:time>12:00</broadcast:time>

if that suits you better.

The "broadcast" prefix would be associated with a URI representing
a namespace for this modular extension thusly:

xmlns:broadcast="http://me.org/rss/mod_broadcast"

Of course it'd probably be far more useful to make use of a more standard
extension whenever possible so as to aid interoperability with those
applications not specifically designed to make use of your ad hoc
extensions. Any RSS application understanding and using dc:date would have
no trouble with a) above.

As an aside, Dave Winer has asked before (can't quite remember where,
unfortunately) whether or not 0.92[4] should include a date/time element at
the item level; I'd say so -- I keep seeing it popping up in postings like
this one and it would also perhaps work nicely with the <enclosure> element
so as to allow enclosures to be scheduled for some time in the future while
the URL is already known.

Regards,

Rael

[1] http://purl.org/rss/1.0/
[2] http://purl.org/rss/1.0/modules/dc/
[3] "A date associated with an event in the life cycle of the resource"
http://purl.org/dc/elements/1.1/
[4] http://backend.userland.com/rss092

--

> From: Simon Fell [mailto:soap@...]

> I've been looking at RSS to see if its suitable for syndicating
> information about time relative content, i.e. Live audio/video webcast
> streams. There doesn't appear to be any structured way to include the
> date/time info, which has lead me in the direction of putting the
> date/times in the <title> and then either each night generating a new
> list of what's coming up tomorrow, or adding items a few hours before
> they start.
> A few questions
> 1. Is RSS the best approach for this, is there some other standard
> that would suit it better ?
> 2.Is my assumption on handling date/times in RSS correct ?




Mon Mar 12, 2001 8:34 am

rael@...
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Message #1175 of 4640 |
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Hi, I've been looking at RSS to see if its suitable for syndicating information about time relative content, i.e. Live audio/video webcast streams. There...
Simon Fell
soap@...
Send Email
Mar 12, 2001
7:16 am

Howdy, RSS is perfect for your purposes. Unfortunately you're right, 0.9x do not currently have a per-item date/time element. It's exactly the problems ...
Rael Dornfest
rael@...
Send Email
Mar 12, 2001
8:35 am

Rael, Thanks for the info, most useful. I would of thought that using the Dublin Core would be more useful out of the two. BTW, does anyone know where i can...
Simon Fell
soap@...
Send Email
Mar 13, 2001
4:04 am

Rael, thanks for the info, I finally got some time to work on this (much later than planned), I have a question about sy:updateBase, should this be kept upto...
Simon Fell
soap@...
Send Email
Apr 15, 2001
2:17 am

Don't know if you're aware of these or not, but just in case - IETF Calendaring and Scheduling WG: http://www.ietf.org/html.charters/calsch-charter.html W3C...
Mark Nottingham
mnot@...
Send Email
Apr 15, 2001
9:32 pm

Thanks Mark, i was aware of the RDF list, just joined that last week. I'll take a look at the IETF stuff, but based on past experience (with vCalendar), no one...
Simon Fell
soap@...
Send Email
Apr 15, 2001
9:51 pm

Oh, I'm with you re: the mire of vCalendar. I was just thinking that they might have a perspective on what makes a good schedule representation. I wasn't aware...
Mark Nottingham
mnot@...
Send Email
Apr 15, 2001
10:07 pm

In article <2g5kdt84h55orvtp9bbbhcalv36lq6ciue@...>, Simon Fell <soap@...> writes ... ISTM that Interop should be a required part of any XML...
Julian Bond
julian@...
Send Email
Apr 16, 2001
6:54 am

This is up. Upcoming live webcasts http://partners.streetfusion.com/rdf/live.rdf new archived webcasts http://partners.streetfusion.com/rdf/archive.rdf Drop me...
Simon Fell
soap@...
Send Email
Apr 16, 2001
2:14 am

... updateBase can certainly be a static value. If you want to keep track of the last update, dc:date would be more appropriate. -- [ Aaron Swartz |...
Aaron Swartz
aswartz@...
Send Email
Apr 17, 2001
4:14 am

Thanks Aaron, Cheers Simon...
Simon Fell
soap@...
Send Email
Apr 17, 2001
5:04 am

Simon, as far as I'm concerned this would be a good enough reason to open a new page and start work on RSS 0.93. Ideally, someone would make a proposal in the...
Dave Winer
dave@...
Send Email
Mar 12, 2001
3:52 pm

... Can you categorize the "type" of support you'd be interested in? Some tools will read RSS, preserve and pass on anything read (ie. they "support" optional...
Ken MacLeod
ken@...
Send Email
Mar 20, 2001
4:54 pm

... With all due respect Rael, it's totally possible to do what he wants with RSS 0.9x. It's called working together -- something we've been doing a lot of...
Dave Winer
dave@...
Send Email
Apr 15, 2001
2:52 am
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