If query-side multi-term synonyms are important to your application, your
best bet may be to implement a preprocessor that expands them to an OR
sequences of phrases before submitting the query to Solr. That would also
give you an opportunity to boost a preferred synonym.
For example, a user query of
abc John Cena xyz
would be preprocessed and sent to Solr as
abc ("John Cena" OR "Cena John") xyz
You could also consider using phrase slop to handle simple name reversal:
abc "John Cena"~1 xyz
That would also allow a middle initial or name, for example. But, you need
to consider whether you really want that. The simple phrases give you
explicit control.
If the synonym is in a phrase, you might need to consider re-generating the
entire phrase:
abc "def John Cena uvw" xyz
to
abc ("def John Cena uvw" OR "def Cena John uvw") xyz
As a side note, the query parser in LucidWorks Enterprise (and LucidWorks
Cloud) does support multi-term synonyms at query term for normal text
fields, but it does so by bypassing the the processing of the Solr synonym
filter and simply using the synonym file to preprocess the query terms
before completing the term analysis. But, that won't do you any good if you
are not using the Lucid products.
-- Jack Krupansky
-----Original Message-----
From: Noordeen, Roxy
Sent: Thursday, May 03, 2012 9:08 AM
To: solr-user@lucene.apache.org
Subject: RE: synonyms
Jack,
I am also using synonyms at query side, but so far i am able to use only
single words to work, multi words is not working for me. I didn't want to
use synonyms during indexing, to avoid re indexing.
Is there a way for solr to support multi words?
Ex:
John Cena, John, Cena
Or
Triple H, DX, tripleh, hhh.
Thanks
Roxy
-----Original Message-----
From: Jack Krupansky [mailto:j...@basetechnology.com]
Sent: Wednesday, May 02, 2012 8:53 PM
To: solr-user@lucene.apache.org
Subject: Re: synonyms
There are lots of different strategies for dealing with synonyms, depending
on what exactly is most important and what exactly your are willing to
tolerate.
In your latest example, you seem to be using string fields, which is
somewhat different form the text synonyms we talk about in Solr. You can
certainly have multiple string fields, or even a multi-valued string field
to store variations on selected categories of terms. That works well when
you have a well-defined number of categories. So, you can have a user query
go against a combination of normal text fields and these category string
fields.
If that is sufficient for your application, great.
-- Jack Krupansky
-----Original Message-----
From: Carlos Andres Garcia
Sent: Wednesday, May 02, 2012 6:57 PM
To: solr-user@lucene.apache.org
Subject: RE: synonyms
Thanks for your answers, now I have another cuestions,if I develop the
filter to replacement the current synonym filter,I understand that this
procces would be in time of the indexing because in time of the query search
there are a lot problems knows. if so, how can I do for create my index
file.
For example:
I have two synonyms "Nou cam", "Cataluña" for barcelona in the data base
Opcion 1)
In time of the indexing would create 2 records like this:
<doc>
<field>barcelona<field>
<field>Camp Nou<field>
...
<doc>
and
<doc>
<field>barcelona<field>
<field>Cataluña<field>
...
<doc>
Opcion 2)
or only would create one record like this:
<doc>
<field>barcelona<field>
<field>Camp Nou,Cataluña<field>
...
<doc>
If it create the opcion 2 can looking for by Camp Nou y by Cataluña but when
I looking for by barcelona the Solr return 2 records and that is one error
because barcelona is only one
IF it create the opcion 2 , I have searching wiht wildcards for example
*Camp Nou* o *Cataluña* y the solr would return one records, the same case
if searching by barcelona solr would return one recors that is good , but i
want to know if is the better option or solr have another caracteristic
betters that can resolve this topic of one better way.
