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From "Robert Muir (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2764) Create a NorwegianLightStemmer and NorwegianMinimalStemmer
Date Thu, 02 Feb 2012 21:22:55 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199235#comment-13199235
] 

Robert Muir commented on SOLR-2764:
-----------------------------------

Jan, i wasn't trying to be critical about these endings, because of course some of the existing
light stemmers
have a few _selected_ derivational endings that are taken care of. And thats really what its
all about,
when we are talking about something like adjective->noun, I didnt mean to say we shouldn't
do it, because
it sounds quite reasonable: but we should explore the options.

For example, as an alternative to multi-pass, a 'less elegant to some' but really practical
way to go about it
can be to 'multiply through' and convert the possibilities to single-pass.

E.g. the typical 'undrinkables' hunspell example: if i have the english inflectional plural
ending -s and the 
derivational ending -able, instead of:
* pass 1: remove inflectional endings (e.g. -s)
* pass 2: remove derivational endings (e.g. -able)

we just take all the pass 2 endings that are compatible with pass 1 endings and cross-multiply,
to make a single
pass algorithm. some won't be compatible, (so we won't combine -able + -s into -ables).

I'm not sure if this is helpful for the norwegian case as I'm not as familiar with it, just
an idea.

                
> Create a NorwegianLightStemmer and NorwegianMinimalStemmer
> ----------------------------------------------------------
>
>                 Key: SOLR-2764
>                 URL: https://issues.apache.org/jira/browse/SOLR-2764
>             Project: Solr
>          Issue Type: New Feature
>          Components: Schema and Analysis
>            Reporter: Jan H√łydahl
>             Fix For: 3.6, 4.0
>
>         Attachments: SOLR-2764.patch, SOLR-2764.patch, SOLR-2764.patch, SOLR-2764.patch
>
>
> We need a simple light-weight stemmer and a minimal stemmer for plural/singlular only
in Norwegian

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