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https://issues.apache.org/jira/browse/SOLR-1204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12716751#action_12716751
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Michael Ludwig commented on SOLR-1204:
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Hi Robert, it looks like you're talking about this report:
http://unicode.org/reports/tr8/
The XML recommendation might also serve as a point of reference, although both
a NAME and a NMTOKEN are probably too liberal in what they accept (the colon
among others):
http://www.w3.org/TR/REC-xml/#NT-Name
Shalin mentioned Java identifiers, probably without intending to ban names such
as "null" and "class":
http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#40625
I'm not Unicode-savvy enough to know what's behind all these classes, and I'm
not Solr-savvy enough to know which of the punctuation characters that have
special meaning in the Solr query language should or must be excluded. So first
the spec, then the implementation (regular expression, or some schema
technology to validate the field names in schema.xml, or whatever).
> Enhance SpellingQueryConverter to handle UTF-8 instead of ASCII only
> --------------------------------------------------------------------
>
> Key: SOLR-1204
> URL: https://issues.apache.org/jira/browse/SOLR-1204
> Project: Solr
> Issue Type: Improvement
> Components: spellchecker
> Affects Versions: 1.3
> Reporter: Michael Ludwig
> Assignee: Shalin Shekhar Mangar
> Priority: Trivial
> Fix For: 1.4
>
> Attachments: SpellingQueryConverter.java.diff,
> SpellingQueryConverter.java.diff
>
>
> Solr - User - SpellCheckComponent: queryAnalyzerFieldType
> http://www.nabble.com/SpellCheckComponent%3A-queryAnalyzerFieldType-td23870668.html
> In the above thread, it was suggested to extend the SpellingQueryConverter to
> cover the full UTF-8 range instead of handling US-ASCII only. This might be
> as simple as changing the regular expression used to tokenize the input
> string to accept a sequence of one or more Unicode letters ( \p{L}+ ) instead
> of a sequence of one or more word characters ( \w+ ).
> See http://java.sun.com/j2se/1.4.2/docs/api/java/util/regex/Pattern.html for
> Java regular expression reference.
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