Printjoin characters are nonalphanumeric characters that are to be included in index tokens, so that words such as vice-president are indexed as vice-president.

The following example sets printjoin characters to be the hyphen and underscore with BASIC_LEXER:

begin
ctx_ddl.create_preference('mylex', 'BASIC_LEXER');
ctx_ddl.set_attribute('mylex', 'printjoins', '_-');
end;

Create the index with printjoins characters set as previously shown:

create index myindex on mytable ( docs ) 
  indextype is ctxsys.context 
  parameters ( 'LEXER mylex' );