Create and use your own language-specific conditions (such as common abbreviations) when chunking data.

1. Connect as a local user and prepare your data dump directory.
   1. Log in to SQL*Plus as the SYS user, connecting as SYSDBA:

      conn sys/password as sysdba

      CREATE TABLESPACE tbs1
      DATAFILE 'tbs5.dbf' SIZE 20G AUTOEXTEND ON
      EXTENT MANAGEMENT LOCAL
      SEGMENT SPACE MANAGEMENT AUTO;

      SET ECHO ON
      SET FEEDBACK 1
      SET NUMWIDTH 10
      SET LINESIZE 80
      SET TRIMSPOOL ON
      SET TAB OFF
      SET PAGESIZE 10000
      SET LONG 10000

   2. Create a local user (docuser) and grant necessary privileges:

      drop user docuser cascade;

      create user docuser identified by docuser DEFAULT TABLESPACE tbs1 quota unlimited on tbs1;

      grant DB_DEVELOPER_ROLE to docuser;

   3. Create a local directory (VEC_DUMP) to store your language data file. Grant necessary privileges:

      create or replace directory VEC_DUMP as '/my_local_dir/';

      grant read, write on directory VEC_DUMP to docuser;
      
      commit;

   4. Transfer the data file for your required language to the VEC_DUMP directory. For example, dreoszhs.txt for Simplified Chinese.

      To know the data file location for your language, see Supported Languages and Data File Locations.

   5. Connect as the local user (docuser):

      conn docuser/password

2. Create a relational table (doc_langtab) to store your abbreviation tokens in it:

   CREATE TABLE doc_langtab(token nvarchar2(64))
     ORGANIZATION EXTERNAL
     (default directory VEC_DUMP
      ACCESS PARAMETERS (RECORDS DELIMITED BY NEWLINE CHARACTERSET AL32UTF8)
      location ('dreoszhs.txt'));

3. Create language data (doc_lang_data) by calling DBMS_VECTOR_CHAIN.CREATE_LANG_DATA:

   DECLARE
     lang_params clob := '{
                            "table_name"      : "doc_langtab",
                            "column_name"     : "token",
                            "language"        : "simplified chinese",
                            "preference_name" : "doc_lang_data"
                          }';
   BEGIN
     dbms_vector_chain.create_lang_data(json(lang_params));
   END;
   /