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Date: Mon, 6 Dec 2010 09:38:12 -0500 (EST)
From: "Robert Muir (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (SOLR-1979) Create
 LanguageIdentifierUpdateProcessor
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    [ https://issues.apache.org/jira/browse/SOLR-1979?page=3Dcom.atlassian.=
jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D12967=
201#action_12967201 ]=20

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

bq. Both also rely on those fields existing.

I don't think this check should be at "runtime" either.

What if you are indexing lots of documents and suddenly you encounter a tha=
i document (or mis-detected as Thai!) and the whole thing fails?

Can't we validate the output mapping (and log it!) at initialization time?


> 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=C3=B8ydahl
>            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 ac=
t 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 c=
ontent.
> To do this, we wrap the Tika LanguageIdentifier in an UpdateProcessor. Th=
e processor is configurable like this:
> {code:xml}=20
>   <processor class=3D"org.apache.solr.update.processor.LanguageIdentifier=
UpdateProcessorFactory">
>     <str name=3D"inputFields">name,subject</str>
>     <str name=3D"outputField">language_s</str>
>     <str name=3D"idField">id</str>
>     <str name=3D"fallback">en</str>
>   </processor>
> {code}=20
> It will then read the text from inputFields name and subject, perform lan=
guage identification and output the ISO code for the detected language in t=
he outputField. If no language was detected, fallback language is used.

--=20
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