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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-1979) Create LanguageIdentifierUpdateProcessor
Date Mon, 06 Dec 2010 14:09:14 GMT

    [ https://issues.apache.org/jira/browse/SOLR-1979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12967191#action_12967191
] 

Robert Muir commented on SOLR-1979:
-----------------------------------

bq. Agreed.The only thing we are doing now is using the language that the language detector
returns as part of the field name. Both of these steps are easily overridable. Both also rely
on those fields existing.

"Easily overridable" does not solve the problem!

Please don't commit this, its so easy to just change the code, variable names, documentation
here to say these interfaces are BCP47 language ids.

We should not be using 639-1 codes in any APIs!!!!!!!

> Create LanguageIdentifierUpdateProcessor
> ----------------------------------------
>
>                 Key: SOLR-1979
>                 URL: https://issues.apache.org/jira/browse/SOLR-1979
>             Project: Solr
>          Issue Type: New Feature
>          Components: update
>            Reporter: Jan H√łydahl
>            Assignee: Grant Ingersoll
>            Priority: Minor
>         Attachments: SOLR-1979.patch, SOLR-1979.patch, SOLR-1979.patch
>
>
> We need the ability to detect language of some random text in order to act upon it, such
as indexing the content into language aware fields. Another usecase is to be able to filter/facet
on language on random unstructured content.
> To do this, we wrap the Tika LanguageIdentifier in an UpdateProcessor. The processor
is configurable like this:
> {code:xml} 
>   <processor class="org.apache.solr.update.processor.LanguageIdentifierUpdateProcessorFactory">
>     <str name="inputFields">name,subject</str>
>     <str name="outputField">language_s</str>
>     <str name="idField">id</str>
>     <str name="fallback">en</str>
>   </processor>
> {code} 
> It will then read the text from inputFields name and subject, perform language identification
and output the ISO code for the detected language in the outputField. If no language was detected,
fallback language is used.

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