The CREATE INDEX can specify Omnidex indexes. Typically, Omnidex indexes are specified in the CREATE TABLE statement for ease of maintenance.
CREATE <OMNIDEX | QUICKTEXT | FULLTEXT | CUSTOM | NATIVE> INDEX [[(owner)]table.]index
[ON table_spec] (<column | substring> [, <column | substring>…] )]
[KEYWORDING]
[PROXIMITY]
[<CASE_INSENSITIVE | CASE_SENSITIVE>]
[STANDALONE]
[BITMAP]
[EXCLUDED_WORDS]
[PHONETIC]
[PREJOIN table]
[<RECORD_SPECIFIC | RECORD_COMPLEX>]]
IN “filename”
[WITH options]