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https://issues.apache.org/jira/browse/LUCENE-1758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12739242#action_12739242
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Mark Miller commented on LUCENE-1758:
-------------------------------------
Its not released, but Arabic Analyzer has been around long enough thats its
certainly in use by at least a couple people - lets be very explicit in the
contrib changes (which I'm sure non of these users will read ;) ) about the
lowercase compat break.
> improve arabic analyzer: light8 -> light10
> ------------------------------------------
>
> Key: LUCENE-1758
> URL: https://issues.apache.org/jira/browse/LUCENE-1758
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/analyzers
> Reporter: Robert Muir
> Assignee: Robert Muir
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1758.patch, LUCENE-1758.patch, LUCENE-1758.txt
>
>
> Someone mentioned on the java user list that the arabic analysis was not as
> good as they would like.
> This patch adds the لل- prefix (light10 algorithm versus light8 algorithm).
> In the light10 paper, this improves precision from .390 to .413
> They mention this is not statistically significant, but it makes linguistic
> sense and at least has been shown not to hurt.
> In the future, I hope openrelevance will allow us to try some more
> approaches.
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