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RE: Distributed searches in Z39.50?

From: Matthew Dovey (LAS) <matthew.dovey@las.ox.ac.uk>
Date: Tue, 20 Apr 2004 13:40:55 +0100
Message-ID: <41AB0A86E101A34FA839E3C199628AC90AA4D0@samantha.ceridwen.com>
To: "ZIG" <www-zig@w3.org>

> I think the most obvious solution, if you want to stay close 
> to what's in the current standard, involves a combination of 
> concurrent operations and 
> asynchronous resource control requests coming back from the 
> server.    The 
> User Information format SearchResult-1 already provides most 
> of the data elements you would want to describe partial 
> search results, and if you use this together with resource 
> control, it seems clear to me that the intent is that the 
> client should be able to issue present requests on the 
> partial results, even  before the final search response has 
> been received.

The main limitation that I hit with this approach (and I think raised it
at the time, so it will be in the archives of the ZIG list from about
1998/1999!) is that the SearchResult-1 format can return how many
records per database but not directly whether database returned an error
or time-out (i.e. you can say a databse returned 0 results but not
whether that was an error or a real 0 results) (without using other
mechanisms to query what that 0 results means).

Matthew
Received on Tuesday, 20 April 2004 08:41:27 GMT

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