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From "Robert Muir (Commented) (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3748) EnglishPossessiveFilter should work with Unicode right single quotation mark
Date Fri, 03 Feb 2012 00:20:55 GMT


Robert Muir commented on LUCENE-3748:

Walter: U+2019 does not decompose at all (see

This is because its not a compatibility character of any reason, in fact its the single quote
thats ambiguous, U+2019 is the correct one here.

>From a pedantic point of view, we should be forcing you to disambiguate the very ambiguous
single quote (U+0027)
on your keyboard and *ONLY* handling U+2019 in this filter, but I realize some people might
find this opinion a 
tad extreme :)

> EnglishPossessiveFilter should work with Unicode right single quotation mark
> ----------------------------------------------------------------------------
>                 Key: LUCENE-3748
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: modules/analysis
>    Affects Versions: 3.1, 3.2, 3.4, 3.5
>            Reporter: David Croley
>            Assignee: Robert Muir
>            Priority: Minor
>         Attachments: LucenePatch, Patch-Lucene-3748
> The current EnglishPossessiveFilter (used in EnglishAnalyzer) removes possessives using
only the '\'' character (plus 's' or 'S'), but some common systems (German?) insert the Unicode
"\u2019" (RIGHT SINGLE QUOTATION MARK) instead and this is not removed when processing UTF-8
text. I propose to change EnglishPossesiveFilter to support '\u2019' as an alternative to

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