anchor.diff:  
   == ICU Folding Filter
   
  -This filter is a custom Unicode normalization form that applies the foldings specified in http://www.unicode.org/reports/tr30/tr30-4.html[Unicode Technical Report 30] in addition to the `NFKC_Casefold` normalization form as described in <<ICU Normalizer 2 Filter>>. This filter is a better substitute for the combined behavior of the <<ASCII Folding Filter>>, <<Lower Case Filter>>, and <<ICU Normalizer 2 Filter>>.
  +This filter is a custom Unicode normalization form that applies the foldings specified in http://www.unicode.org/reports/tr30/tr30-4.html[Unicode TR #30: Character Foldings] in addition to the `NFKC_Casefold` normalization form as described in <<ICU Normalizer 2 Filter>>. This filter is a better substitute for the combined behavior of the <<ASCII Folding Filter>>, <<Lower Case Filter>>, and <<ICU Normalizer 2 Filter>>.
   
   To use this filter, see `solr/contrib/analysis-extras/README.txt` for instructions on which jars you need to add to your `solr_home/lib`. For more information about adding jars, see the section <<lib-directives-in-solrconfig.adoc#lib-directives-in-solrconfig,Lib Directives in Solrconfig>>.
   
   *Factory class:* `solr.ICUFoldingFilterFactory`
   
  -*Arguments:* None
  -
  -*Example:*
  +*Arguments:*
  +
  +`filter`:: (string, optional) A Unicode set filter that can be used to e.g., exclude a set of characters from being processed. See the http://icu-project.org/apiref/icu4j/com/ibm/icu/text/UnicodeSet.html[UnicodeSet javadocs] for more information.
  +
  +*Example without a filter:*
   
   [source,xml]
   ----
  
positive.code: </analyzer>
  ----
  
  For detailed information on this normalization form, see http://www.unicode.org/reports/tr30/tr30-4.html.
  
  == ICU Normalizer 2 Filter
  
  This filter factory normalizes text according to one of five Unicode Normalization Forms as described in http://unicode.org/reports/tr15/[Unicode Standard Annex #15]:
  
  * NFC: (name="nfc" mode="compose") Normalization Form C, canonical decomposition
  * NFD: (name="nfc" mode="decompose") Normalization Form D, canonical decomposition, followed by canonical composition
  * NFKC: (name="nfkc" mode="compose") Normalization Form KC, compatibility decomposition
  * NFKD: (name="nfkc" mode="decompose") Normalization Form KD, compatibility decomposition, followed by canonical composition
  * NFKC_Casefold: (name="nfkc_cf" mode="compose") Normalization Form KC, with additional Unicode case folding. Using the ICU Normalizer 2 Filter is a better-performing substitution for the <<Lower Case Filter>> and NFKC normalization.
  
  *Factory class:* `solr.ICUNormalizer2FilterFactory`
  
  *Arguments:*
  
  `name`:: (string) The name of the normalization form; `nfc`, `nfd`, `nfkc`, `nfkd`, `nfkc_cf`
  
  `mode`:: (string) The mode of Unicode character composition and decomposition; `compose` or `decompose`
  
  *Example:*
  
  [source,xml]
  ----
  
negative.code: </analyzer>
  ----
  
  *Example with a filter to exclude Swedish/Finnish characters:*
  
  [source,xml]
  ----
  <analyzer>
    <tokenizer class="solr.StandardTokenizerFactory"/>
    <filter class="solr.ICUNormalizer2FilterFactory" name="nfkc_cf" mode="compose" filter="[^åäöÅÄÖ]"/>
  </analyzer>
  ----
  
  For detailed information about these normalization forms, see http://unicode.org/reports/tr15/[Unicode Normalization Forms].
  
  To use this filter, see `solr/contrib/analysis-extras/README.txt` for instructions on which jars you need to add to your `solr_home/lib`.
  
  