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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2019) map unicode process-internal codepoints to replacement character
Date Fri, 30 Oct 2009 21:47:01 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772110#action_12772110
] 

Robert Muir commented on LUCENE-2019:
-------------------------------------

Michael, well if we go by the unicode standard:
Section 3.2

C2 A process shall not interpret a noncharacter code point as an abstract character.
• The noncharacter code points may be used internally, such as for sentinel values
or delimiters, but should not be exchanged publicly.

This makes me think they should not be in terms, but i'll take anyone's interpretation.
if people disagree, just cancel the issue as not fix. i don't think this approach will hurt
performance.


> map unicode process-internal codepoints to replacement character
> ----------------------------------------------------------------
>
>                 Key: LUCENE-2019
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2019
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Robert Muir
>            Priority: Minor
>         Attachments: LUCENE-2019.patch
>
>
> A spinoff from LUCENE-2016.
> There are several process-internal codepoints in unicode, we should not store these in
the index.
> Instead they should be mapped to replacement character (U+FFFD), so they can be used
process-internally.
> An example of this is how Lucene Java currently uses U+FFFF process-internally, it can't
be in the index or will cause problems. 

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