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Posted to solr-user@lucene.apache.org by Doss <it...@gmail.com> on 2007/09/06 09:29:22 UTC

Tagging using SOLR

Dear all,

We are running an appalication built using SOLR, now we are trying to build
a tagging system using the existing SOLR indexed field called
"tag_keywords", this field has different keywords seperated by comma, please
give suggestions on how can we build tagging system using this field?

Thanks,
Mohandoss.

Re: Tagging using SOLR

Posted by Thorsten Scherler <th...@juntadeandalucia.es>.
On Thu, 2007-09-06 at 12:59 +0530, Doss wrote:
> Dear all,
> 
> We are running an appalication built using SOLR, now we are trying to build
> a tagging system using the existing SOLR indexed field called
> "tag_keywords", this field has different keywords seperated by comma, please
> give suggestions on how can we build tagging system using this field?

http://wiki.apache.org/solr/ConfiguringSolr

http://wiki.apache.org/solr/SchemaXml
Define a new field named keyword and use the "text_ws" as type. Instead
of comma use whitespaces instead.
...
<!-- A text field that only splits on whitespace for exact matching of
words -->
    <fieldtype name="text_ws" class="solr.TextField"
positionIncrementGap="100">
      <analyzer>
        <tokenizer class="solr.WhitespaceTokenizerFactory"/>
      </analyzer>
    </fieldtype>
...
<field name="id" type="text_ws" indexed="true" stored="true"/>

HTH

salu2
-- 
Thorsten Scherler                                 thorsten.at.apache.org
Open Source Java                      consulting, training and solutions

Re: Tagging using SOLR

Posted by Erik Hatcher <er...@ehatchersolutions.com>.
On Sep 7, 2007, at 3:09 AM, Doss wrote:
> Thanks for the guidelines, but basically our idea is to build a  
> system like
> http://del.icio.us/tag/, is it possible to take counts of similar  
> words from
> a solr indexed field?

How do you define similar words?

Here's a tag cloud for a single user in Collex, a system I built:

	<http://www.nines.org/permalink/cloud/tag/nowviskie>

Collex is using SOLR-139 now for tagging/annotating.

You will need to think through handling updates to your documents,  
and whether you will have user-specific tags too.  Reading up on the  
links I sent you and doing some experimenting is highly recommended.   
It's a non-trivial  scenario with Solr at this time.

By the way, a del.icio.us competitor, Simpy, is built on Lucene - so  
it is quite possible to build a heavy duty tagging system, but the  
devil is in the details.

	Erik



>
> Thanks,
> Mohandoss
>
>
> On 9/6/07, Erik Hatcher <er...@ehatchersolutions.com> wrote:
>>
>>
>> On Sep 6, 2007, at 3:29 AM, Doss wrote:
>>> We are running an appalication built using SOLR, now we are trying
>>> to build
>>> a tagging system using the existing SOLR indexed field called
>>> "tag_keywords", this field has different keywords seperated by
>>> comma, please
>>> give suggestions on how can we build tagging system using this  
>>> field?
>>
>> There is also a wiki page on some brainstorming on how to implement
>> tagging within Solr: <http://wiki.apache.org/solr/UserTagDesign>
>>
>> It's easy enough to have a tag_keywords field, but updating a single
>> tag_keywords field is not so straightforward without sending the
>> entire document to Solr every time it is tagged.  See SOLR-139's
>> extensive comments and patches to see what you're getting into.
>>
>>        Erik
>>
>>

Re: Tagging using SOLR

Posted by Doss <it...@gmail.com>.
Dear Thorsten, Erik,

Thanks for the guidelines, but basically our idea is to build a system like
http://del.icio.us/tag/, is it possible to take counts of similar words from
a solr indexed field?

Thanks,
Mohandoss


On 9/6/07, Erik Hatcher <er...@ehatchersolutions.com> wrote:
>
>
> On Sep 6, 2007, at 3:29 AM, Doss wrote:
> > We are running an appalication built using SOLR, now we are trying
> > to build
> > a tagging system using the existing SOLR indexed field called
> > "tag_keywords", this field has different keywords seperated by
> > comma, please
> > give suggestions on how can we build tagging system using this field?
>
> There is also a wiki page on some brainstorming on how to implement
> tagging within Solr: <http://wiki.apache.org/solr/UserTagDesign>
>
> It's easy enough to have a tag_keywords field, but updating a single
> tag_keywords field is not so straightforward without sending the
> entire document to Solr every time it is tagged.  See SOLR-139's
> extensive comments and patches to see what you're getting into.
>
>        Erik
>
>

Re: Tagging using SOLR

Posted by Erik Hatcher <er...@ehatchersolutions.com>.
On Sep 6, 2007, at 3:29 AM, Doss wrote:
> We are running an appalication built using SOLR, now we are trying  
> to build
> a tagging system using the existing SOLR indexed field called
> "tag_keywords", this field has different keywords seperated by  
> comma, please
> give suggestions on how can we build tagging system using this field?

There is also a wiki page on some brainstorming on how to implement  
tagging within Solr: <http://wiki.apache.org/solr/UserTagDesign>

It's easy enough to have a tag_keywords field, but updating a single  
tag_keywords field is not so straightforward without sending the  
entire document to Solr every time it is tagged.  See SOLR-139's  
extensive comments and patches to see what you're getting into.

	Erik