Re: Why not use the guid? (was Re: [syndication] Yahoo! News RSS Feeds Launched)

["Dave Winer" <dave@userland.com>]

Very cool. ;->


----- Original Message -----
From: "Mark Fletcher" <markf@wingedpig.com>
To: <syndication@yahoogroups.com>
Sent: Tuesday, August 26, 2003 7:42 PM
Subject: Re: Why not use the guid? (was Re: [syndication] Yahoo! News RSS
Feeds Launched)


> Dave Winer wrote:
>
> >They have a guid on each item -- why not use it?
> >
> >http://backend.userland.com/permalinksNewsAggregators
> >
> >
> Of course we use the guid. That's our index (along with the site id)
> into the database for each item. It's also how we can tell that a
> particular item has been changed or edited. So we have cases where there
> are new items, when the guid doesn't appear in the database, and cases
> where items have been edited, because we go in and compare different
> fields of the item with what we fetched last time. We highlight the item
> in either case.
>
> So in this case, the guids were fine and we were able to fetch the
> previously-fetched items out of our database. We then compared the
> various parts of each item to our previously fetched info, like the
> description, title, and link. The links were different, so we considered
> the items to be updated, which we highlighted for our users.
>
>
> Thanks,
>
> Mark
> --
> Mark Fletcher
> Bloglines
> http://www.bloglines.com
>
>
>
>
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