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DM Smith commented on LUCENE-1813:
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I like the idea of a constant and it presented as a default. I suggest that others be given
in the JavaDoc.
I have some texts which are using PUAs until Unicode includes the code points (e.g. Myanmar
text), so I'm glad that allowing a choice doesn't create a potential conflict there. I think
PUA should be left to the text author.
As my texts are all derived from XML, I like the use of a character that is not allowed in
XML. I think 0001 is just fine, even if not from a purity perspective.
Some of my texts have BIDI markers and while these will be stripped by filters, I don't think
this use is analogous.
> Add option to ReverseStringFilter to mark reversed tokens
> ---------------------------------------------------------
>
> Key: LUCENE-1813
> URL: https://issues.apache.org/jira/browse/LUCENE-1813
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/analyzers
> Affects Versions: 2.9
> Reporter: Andrzej Bialecki
> Assignee: Robert Muir
> Fix For: 2.9
>
> Attachments: LUCENE-1813.patch, reverseMark-2.patch, reverseMark.patch
>
>
> This patch implements additional functionality in the filter to "mark" reversed tokens
with a special marker character (Unicode 0001). This is useful when indexing both straight
and reversed tokens (e.g. to implement efficient leading wildcards search).
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