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https://issues.apache.org/jira/browse/LUCENE-4019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13260638#comment-13260638
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Robert Muir commented on LUCENE-4019:
-------------------------------------
its tough to know for sure. in general a lot of hunspell dictionaries cannot be
parsed.
There are a ton of these, under many strange licenses and they are very large.
A "Test scaffolding" of sorts could probably be done to hunt out problems:
* download all dictionaries you can find
* for each one, use hunspell command-line tools like munch, unmunch (which
applies all the rules), etc
to generate some sort of expected output in .txt format.
* for each one, do the same using the hunspell parsing here.
* compare results: when things differ, try to boil it down to a compact
.aff/.dic, with a test case and fix and commit.
> Parsing Hunspell affix rules without regexp condition
> -----------------------------------------------------
>
> Key: LUCENE-4019
> URL: https://issues.apache.org/jira/browse/LUCENE-4019
> Project: Lucene - Java
> Issue Type: Improvement
> Components: modules/analysis
> Affects Versions: 3.6
> Reporter: Luca Cavanna
>
> We found out that some recent Dutch hunspell dictionaries contain suffix or
> prefix rules like the following:
> {code}
> SFX Na N 1
> SFX Na 0 ste
> {code}
> The rule on the second line doesn't contain the 5th parameter, which should
> be the condition (a regexp usually). You can usually see a '.' as condition,
> meaning always (for every character). As explained in LUCENE-3976 the
> readAffix method throws error. I wonder if we should treat the missing value
> as a kind of default value, like '.'. On the other hand I haven't found any
> information about this within the spec. Any thoughts?
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