Apache Solr Reference Guide Covering Apache Solr 6.0

The table below presents examples of regex-based pattern replacement:
Input pattern replacement Output Description
see-ing looking (\w+)(ing) $1 see-ing look Removes "ing" from the end of
word.
see-ing looking (\w+)ing $1 see-ing look Same as above. 2nd
parentheses can be omitted.
No.1 NO. no.
543
[nN][oO]\.\s*(\d+) #$1 #1 NO. #543 Replace some string literals
abc=1234=5678 (\w+)=(\d+)=(\d+) $3=$1=$2 5678=abc=1234 Change the order of the
groups.
Related Topics
CharFilterFactories
Language Analysis
This section contains information about tokenizers and filters related to character set conversion or for use with
specific languages. For the European languages, tokenization is fairly straightforward. Tokens are delimited by
white space and/or a relatively small set of punctuation characters. In other languages the tokenization rules are
often not so simple. Some European languages may require special tokenization rules as well, such as rules for
decompounding German words.
For information about language detection at index time, see Detecting Languages During Indexing.
Topics discussed in this section:
KeywordMarkerFilterFactory
KeywordRepeatFilterFactory
StemmerOverrideFilterFactory
Dictionary Compound Word Token Filter
Unicode Collation
ASCII & Decimal Folding Filters
Language-Specific Factories
Related Topics
KeywordMarkerFilterFactory
Protects words from being modified by stemmers. A customized protected word list may be specified with the
"protected" attribute in the schema. Any words in the protected word list will not be modified by any stemmer in
Solr.
A sample Solr protwords.txt with comments can be found in the sample_techproducts_configs config
set directory:
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