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From "Robert Muir (JIRA)" <>
Subject [jira] Created: (LUCENE-2498) add sentence boundary charfilter
Date Sat, 12 Jun 2010 20:39:13 GMT
add sentence boundary charfilter

                 Key: LUCENE-2498
             Project: Lucene - Java
          Issue Type: New Feature
          Components: contrib/analyzers
            Reporter: Robert Muir

>From the discussion of LUCENE-2167:

It would be nice to have a CharFilter? to mark sentence boundaries.
Such functionality would be useful for:
* prevent phrase queries with 0 slop from matching across sentences
* inhibiting multiword synonyms, or shingles, etc.

For sentence boundary detection we could use Jflex's support for the Unicode Sentence_Break
property etc,
and the UAX#29 definition as a default grammar.

One idea is to just mark the boundaries with a user-provided String.

As a simple use-case, a user could then add this string to a stopfilter, and it would introduce
a position increment.
This would inhibit phrase queries, etc.

a user could use the sentence-markers to do more advanced processing downstream.

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