Dear list, it has been some time, but here is what I did. I had a look at Thomas Traeger's tip to use the SnowballPorterFilterFactory, which does not actually do the job. Its purpose is to convert regular ASCII into special characters.
And I want it the other way, such that all special character are converted to regular ASCII. The tip of J.J. Larrea, to use the PatternReplaceFilterFactory, solved the problem. And as Chris Hostetter noted, stored fields always return the initial value, which turned the second part of my question obsolete. Thanks a lot for your help! best Matthias -----Ursprüngliche Nachricht----- Von: Thomas Traeger [mailto:[EMAIL PROTECTED] Gesendet: Mittwoch, 26. September 2007 23:44 An: solr-user@lucene.apache.org Betreff: Re: Converting German special characters / umlaute Try the SnowballPorterFilterFactory described here: http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters You should use the German2 variant that converts ä and ae to a, ö and oe to o and so on. More details: http://snowball.tartarus.org/algorithms/german2/stemmer.html Every document in solr can have any number of fields which might have the same source but have different field types and are therefore handled differently (stored as is, analyzed in different ways...). Use copyField in your schema.xml to feed your data into multiple fields. During searching you decide which fields you like to search on (usually the analyzed ones) and which you retrieve when getting the document back. Tom Matthias Eireiner schrieb: > Dear list, > > I have two questions regarding German special characters or umlaute. > > is there an analyzer which automatically converts all german special > characters to their specific dissected from, such as ü to ue and ä to > ae, etc.?! > > I also would like to have, that the search is always run against the > dissected data. But when the results are returned the initial data > with the non modified data should be returned. > > Does lucene GermanAnalyzer this job? I run across it, but I could not > figure out from the documentation whether it does the job or not. > > thanks a lot in advance. > > Matthias >
