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From "Jack Krupansky" <>
Subject Re: Search MoreLikeThis ID into another collations
Date Wed, 15 May 2013 00:51:07 GMT
Oh, yes, definitely... you can certainly do it yourself.

It would be nice to have a request handler that did the document 
"characterization", returning the most significant terms. Then the app could 
simply send a request for that to the first collection and then turn it into 
a query for the other collection.

-- Jack Krupansky

-----Original Message----- 
From: Walter Underwood
Sent: Tuesday, May 14, 2013 8:44 PM
Subject: Re: Search MoreLikeThis ID into another collations

I know this can be done, because I did it in Ultraseek. It was the first 
feature I wrote, probably around 1997.

Take the most significant terms from the document and turn them into a 
query. You can use the tf-idf scores of the terms as weights. I tested my 
queries (without weights) from Ultraseek against several WWW search engines 
(we used to have a lot more of those). Two test documents that I remember 
were the "Yes, Virginia there is a Santa Claus" newspaper column and a Kodak 
Tri-X film datasheet. For there first, there are lots of copies on the 
internet. For the second, there are (were) lots of similar 400 speed black 
and white films. I was an Ilford man, myself.

It worked pretty well.


On May 14, 2013, at 5:20 PM, Jack Krupansky wrote:

> Do you mean pointing to a document in one collection and retrieving 
> documents from another collection that are similar to the first document? 
> Not that I know of.
> Sounds like a reasonable Jira request.
> But... the too collections would need to be fairly similar overall 
> themselves, because the characterization of the first document would be 
> based on terms in that collection, but those terms might not even occur in 
> the other collection.
> -- Jack Krupansky
> -----Original Message----- From: SweetEmerald
> Sent: Tuesday, May 14, 2013 6:57 PM
> To:
> Subject: Search MoreLikeThis ID into another collations
> Hi!
> Im new in Solr, I would like to do a MoreLikeThis search for an ID into
> other collections, not only in the collection that owns that ID
> Is that posible? do you have an example?
> Thank you very much!
> --
> View this message in context: 
> Sent from the Solr - User mailing list archive at

Walter Underwood

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