Re: Persistence of items

["Bill Kearney" <wkearney99@hotmail.com>]

--- In syndication@y..., Julian Bond <julian@n...> wrote:
> Let's say you take an RSS feed from one source. You store the 
results in
> a dbms. You collect the feed regularly. The source updates the feed 
by
> adding items at the top and knocking them off the bottom so there's
> always 15. Is there any easy way of identifying a particular item
> between updates? I want the item to be persistent in my dbms so I 
can do
> other things with it.

This wouldn't be a problem if items included a 'perma-link' to the 
original source of the data.  The RDF 1.0 spec seems to have some 
kind of support for this via a <link> tag for each <item>.  In theory 
this could be unique.  But it would requires the various aggregating 
tools to preserve this value.  How many do this currently?

This raises a bunch of other issues like 'single-instance store' for 
space and bandwidth savings.

-Bill Kearney