add sentence boundary charfilter
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Key: LUCENE-2498
URL: https://issues.apache.org/jira/browse/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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