Index special characters in SQL 7 Syntax

!= -> comparaison_op
% -> match_string
' -> allocate_spec
            -> alter_database
            -> archive_log_spec
            -> comment_command
            -> create_databaselink
            -> file_list
            -> file_reuse
            -> file_spec_redo
            -> file_spec
            -> group_file
            -> match_string
            -> quoted_string
            -> recover_clause
(+) -> variable
( -> alter_cluster_spec
            -> alter_index_spec
            -> alter_rollback
            -> alter_table_spec
            -> binary_type
            -> character_type
            -> create_cluster_spec
            -> create_cluster
            -> create_index
            -> create_snapshot
            -> create_table
            -> create_tablespace
            -> create_view
            -> decimal_type
            -> def_column_constraint
            -> def_table_constraint
            -> enable_spec
            -> factor
            -> file_spec_redo
            -> grant_object
            -> group_file
            -> index_storage
            -> insert_command
            -> integer_type
            -> logical_factor
            -> storage_parameter
            -> subquery_update
            -> subquery
            -> trigger_when
            -> value_list
) -> alter_cluster_spec
            -> alter_index_spec
            -> alter_rollback
            -> alter_table_spec
            -> binary_type
            -> character_type
            -> create_cluster_spec
            -> create_cluster
            -> create_index
            -> create_snapshot
            -> create_table
            -> create_tablespace
            -> create_view
            -> decimal_type
            -> def_column_constraint
            -> def_table_constraint
            -> enable_spec
            -> factor
            -> file_spec_redo
            -> grant_object
            -> group_file
            -> index_storage
            -> insert_command
            -> integer_type
            -> logical_factor
            -> storage_parameter
            -> subquery_update
            -> subquery
            -> trigger_when
* -> displayed_column
            -> factor
            -> select_command
            -> term
+ -> expression
            -> number
            -> value
, -> alter_database
            -> alter_system
            -> audit_object
            -> audit_sql
            -> column_list
            -> constraint_list
            -> create_cluster
            -> create_view
            -> decimal_type
            -> distribution_list
            -> exp_set
            -> factor
            -> file_list
            -> file_reuse_list
            -> file_spec_list
            -> grant_object
            -> grant_priv
            -> group_clause
            -> group_file_list
            -> lock_command
            -> logfile_clause
            -> modified_column_list
            -> new_column_list
            -> new_constraint_list
            -> noaudit_object
            -> noaudit_sql
            -> order_clause
            -> pass_role_list
            -> revoke_object
            -> revoke_priv
            -> role_list
            -> select_command
            -> simple_update
            -> subquery_update
            -> system_spec
            -> tablespace_list
            -> transaction_command
            -> update_clause
            -> user_list
            -> value_list
- -> expression
            -> number
            -> value
.  -> create_snapshot
... -> statement_opt
            -> system_priv
. -> alter_cluster
            -> alter_database
            -> alter_index
            -> alter_sequence
            -> alter_snapshot_log
            -> alter_snapshot
            -> alter_table
            -> alter_trigger
            -> alter_view
            -> analyze_command
            -> analyze_spec
            -> audit_object
            -> comment_command
            -> create_cluster
            -> create_index
            -> create_sequence
            -> create_snapshot_log
            -> create_synonym
            -> create_table
            -> create_trigger
            -> create_view
            -> def_column_constraint
            -> def_table_constraint
            -> delete_command
            -> displayed_column
            -> drop_cluster
            -> drop_index
            -> drop_sequence
            -> drop_snapshot
            -> drop_snapshotlog
            -> drop_synonym
            -> drop_table
            -> drop_trigger
            -> drop_view
            -> enable_spec
            -> explain_command
            -> grant_object
            -> insert_command
            -> lock_command
            -> noaudit_object
            -> number
            -> revoke_object
            -> selected_table
            -> simple_update
            -> subquery_update
            -> trigger_sync
            -> truncate_command
            -> variable
/ -> term
< -> comparaison_op
<= -> comparaison_op
<> -> comparaison_op
= -> comparaison_op
^= -> comparaison_op
= -> explain_command
            -> set_session_spec
            -> simple_update
            -> subquery_update
            -> system_spec
> -> comparaison_op
>= -> comparaison_op
@ -> create_synonym
            -> delete_command
            -> explain_command
            -> insert_command
            -> lock_command
            -> selected_table
            -> simple_update
            -> subquery_update

_ -> match_string