Checked and confirmed, even Dutch digraph Ĳ is folded properly, as well as the upper case dotless Turkish i and the Spanish example you provided is folded properly.
Correction for German (before Nagel corrects me), ö and ü are not normalized by ICU folder according to German rules. Their accents are stripped instead of transforming them into oe and ue respectively. It makes the case of language specific folders, especially when dealing with Scandinavian or German. Dutch and Latin can be folded just by removing their accents. Correct me when im wrong! Markus -----Original message----- > From:Markus Jelsma <markus.jel...@openindex.io> > Sent: Tuesday 13th February 2018 22:21 > To: email@example.com > Subject: RE: Search with Accent and without accent Character > > Hi, > > My guess is you haven't reindexed after changing filter configuration, which > is required for index-time filters. > > Regarding your fieldType, you can drop the lowercase and ASCII folding > filters and just keep the ICU folder, it will work for pretty much any > character set. It will normalize case, Scandinavian digraphs (AE), probably > Dutch digraphs (IJ) as well. But also deal with German oe ü, ringel s and all > regular Latin accents including Spanish tilde ~, circumflex etc. > > If a there is a language specific normalizer/folder, use that instead of ICU > because there can be differences in how accents should be normalized across > languages. > > And do not forget to reindex and use the same normalizers index- and > query-time. > > Regards, > Markus > > > > -----Original message----- > > From:Rushi <rushikeshmod...@gmail.com> > > Sent: Tuesday 13th February 2018 19:40 > > To: firstname.lastname@example.org > > Subject: Search with Accent and without accent Character > > > > Hello All, > > I integrated Nutch with solr ,everything seems to be fine till now, i am > > having a issue while searching some spanish accent characters,the search > > results are not same,with accent (Example :investigación) gives correct > > result but without accent(example :investigacion) gives zero results. > > I tried using various filters but still the issue is same.Here is my > > configuration on nutch and solr. > > > > > > <fieldType name="text_es" class="solr.TextField" > > positionIncrementGap="100"> > > <analyzer type="index"> > > <tokenizer class="solr.StandardTokenizerFactory"/> > > <filter class="solr.ICUFoldingFilterFactory" /> > > <filter class="solr.LowerCaseFilterFactory"/> > > <filter class="solr.ASCIIFoldingFilterFactory"/> > > <filter class="solr.EdgeNGramFilterFactory" minGramSize="3" > > maxGramSize="50" side="front"/> > > </analyzer> > > <analyzer type="query"> > > <tokenizer class="solr.StandardTokenizerFactory"/> > > <filter class="solr.ICUFoldingFilterFactory" /> > > <filter class="solr.LowerCaseFilterFactory"/> > > <filter class="solr.ASCIIFoldingFilterFactory"/> > > > > </analyzer> > > </fieldType> > > > > I would really appreciate if anyone of you can tell me what i am missing? > > -- > > Regards > > Rushikesh M > > .Net Developer > > >