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From: =?utf-8?Q?Jan_H=C3=B8ydahl_=28JIRA=29?= <jira@apache.org>
To: dev@lucene.apache.org
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 <1105142205.29298.1308747167914.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Updated] (SOLR-1979) Create
 LanguageIdentifierUpdateProcessor
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     [ https://issues.apache.org/jira/browse/SOLR-1979?page=3Dcom.atlassian=
.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jan H=C3=B8ydahl updated SOLR-1979:
------------------------------

    Attachment: SOLR-1979.patch

New version. Example of accepted params:

{code}
 <processor class=3D"org.apache.solr.update.processor.LanguageIdentifierUpd=
ateProcessorFactory">
   <defaults>
     <str name=3D"langid">true</str>
     <str name=3D"langid.fl">title,subject,text,keywords</str>
     <str name=3D"langid.langField">language_s</str>
     <str name=3D"langid.langsField">languages</str>
     <str name=3D"langid.overwrite">false</str>
     <float name=3D"langid.threshold">0.5</float>
     <str name=3D"langid.whitelist">no,en,es,dk</str>
     <str name=3D"langid.map">true</str>
     <str name=3D"langid.map.fl">title,text</str>
     <bool name=3D"langid.map.overwrite">false</bool>
     <bool name=3D"langid.map.keepOrig">false</bool>
     <bool name=3D"langid.map.individual">false</bool>
     <str name=3D"langid.map.individual.fl"></str>
     <str name=3D"langid.fallbackFields">meta_content_language,lang</str>
     <str name=3D"langid.fallback">en</str>
   </defaults>
 </processor>
{code}

The only mandatory parameter is langid.fl
To enable field name mapping, set langid.map=3Dtrue. It will then map field=
 names for all fields in langid.fl. If the set of fields to map is differen=
t from langid.fl, supply langid.map.fl. Those fields will then be renamed w=
ith a language suffix equal to the language detected from the langid.fl fie=
lds.

If you require detecting languages separately for each field, supply langid=
.map.individual=3Dtrue. The supplied fields will then be renamed according =
to detected language on an individual basis. If the set of fields to detect=
 individually is different from the already supplied langid.fl or langid.ma=
p.fl, supply langid.map.individual.fl. The fields listed in langid.map.indi=
vidual.fl will then be detected individually, while the rest of the mapping=
 fields will be mapped according to global document language.

> 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: Jan H=C3=B8ydahl
>            Priority: Minor
>         Attachments: SOLR-1979.patch, SOLR-1979.patch, SOLR-1979.patch, S=
OLR-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.

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