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https://issues.apache.org/jira/browse/LUCENE-1515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13835704#comment-13835704
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Karl Wettin commented on LUCENE-1515:
-------------------------------------
This is actually a rather nice stemmer if you ask me. It's semi-expensive due
to the rule-set but does a much better job compared to the standard Swedish
Snowball stemmer and I've successfully used it in several projects.
> Improved(?) Swedish snowball stemmer
> ------------------------------------
>
> Key: LUCENE-1515
> URL: https://issues.apache.org/jira/browse/LUCENE-1515
> Project: Lucene - Core
> Issue Type: New Feature
> Components: modules/analysis
> Affects Versions: 2.4
> Reporter: Karl Wettin
> Attachments: LUCENE-1515.txt
>
>
> Snowball stemmer for Swedish lacks support for '-an' and '-ans' related
> suffix stripping, ending up with non compatible stems for example "klocka",
> "klockor", "klockornas", "klockAN", "klockANS". Complete list of new suffix
> stripping rules:
> {pre}
> 'an' 'anen' 'anens' 'anare' 'aner' 'anerna' 'anernas'
> 'ans' 'ansen' 'ansens' 'anser' 'ansera' 'anserar' 'anserna'
> 'ansernas'
> 'iera'
> (delete)
> {pre}
> The problem is all the exceptions (e.g. svans|svan, finans|fin, nyans|ny) and
> this is an attempt at solving that problem. The rules and exceptions are
> based on the [SAOL|http://en.wikipedia.org/wiki/Svenska_Akademiens_Ordlista]
> entries suffixed with 'an' and 'ans'. There a few known problematic stemming
> rules but seems to work quite a bit better than the current SwedishStemmer.
> It would not be a bad idea to check all of SAOL entries in order to make sure
> the integrity of the rules.
> My Snowball syntax skills are rather limited so I'm certain the code could be
> optimized quite a bit.
> *The code is released under BSD and not ASL*. I've been posting a bit in the
> Snowball forum and privatly to Martin Porter himself but never got any
> response so now I post it here instead in hope for some momentum.
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