Korean language has specific characteristic. When developing search service with lucene & solr in korean, there are some problems in searching and indexing. The korean analyer solved the problems with a korean morphological anlyzer. It consists of a korean morphological analyzer, dictionaries, a korean tokenizer and a korean filter. The korean anlyzer is made for lucene and solr. If you develop a search service with lucene in korean, It is the best idea to choose the korean analyzer.