KOREAN_MORPH_ LEXER Unicode Support

The KOREAN_MORPH_LEXER has the following Unicode support:

• Words in non-KSC5601 Korean characters defined in Unicode

• Supplementary characters

See Also: For information on supplementary characters, see the Oracle Database Globalization Support Guide

Some Korean documents may have non-KSC5601 characters in them. As the KOREAN_MORPH_LEXER can recognize all possible 11,172 Korean (Hangul) characters, such documents can also be interpreted by using the UTF8 or AL32UTF8 character sets.

Use the AL32UTF8 character set for your database to extract surrogate characters. By default, the KOREAN_MORPH_LEXER extracts all series of surrogate characters in a document as one token for each series.

Limitations on Korean Unicode Support

For conversion from Hanja to Hangul (Korean), the KOREAN_MORPH_LEXER supports only the 4,888 Hanja characters defined in KSC5601.