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The "AnalyzersTokenizersTokenFilters" page has been changed by JackKrupansky: http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters?action=diff&rev1=133&rev2=134 Nigerian => "ni", "nig", "nige", "niger", "nigeri", "nigeria", "nigeria", "nigerian" - By default, minGramSize is 1, maxGramSize is 1 and side is "front". You can also set side to generate the ngrams from right to left by setting "side" to a value of "back" + By default, minGramSize is 1, maxGramSize is 1 and side is "front". You can also set side to "back" to generate the ngrams from right to left. - minGramSize - the minimum number of characters to start with. For example, minGramSize=4 would mean that a word like '''Apache''' => "Apac", "Apach", "Apache" would be the 3 tokens stored. + minGramSize - the minimum number of characters to start with. For example, minGramSize=4 would mean that a word like '''Apache''' => "Apac", "Apach", "Apache" would be the 3 tokens output. - This !FilterFactory is very useful in matching substrings of particular terms in the index during query time. + This !FilterFactory is very useful in matching prefix substrings (or suffix substrings if side="back") of particular terms in the index during query time. Edge n-gram analysis can be performed at either index or query time (or both), but typically it is more useful, as shown in this example, to generate the n-grams at index time with all of the n-grams indexed at the same position. At query time the query term can be matched directly without any n-gram analysis. Unlike wildcards, n-gram query terms can be used within quoted phrases. {{{ - <fieldtype name="testedgengrams" class="solr.TextField"> - <analyzer> + <fieldType name="text_general_edge_ngram" class="solr.TextField" positionIncrementGap="100"> + <analyzer type="index"> - <tokenizer class="solr.LowerCaseTokenizerFactory"/> + <tokenizer class="solr.LowerCaseTokenizerFactory"/> - <filter class="solr.EdgeNGramFilterFactory" minGramSize="2" maxGramSize="15" side="front"/> + <filter class="solr.EdgeNGramFilterFactory" minGramSize="2" maxGramSize="15" side="front"/> </analyzer> + <analyzer type="query"> + <tokenizer class="solr.LowerCaseTokenizerFactory"/> + </analyzer> - </fieldtype> + </fieldType> }}} <<Anchor(KeepWordFilter)>>
