{ segment_attributes_clause
| ORGANIZATION 
  { HEAP [segment_attributes_clause] 
  | INDEX [segment_attributes_clause] index_org_table_clause
  | EXTERNAL external_table_clause 
  }
| CLUSTER cluster ( column [, column]... )
}

For information on the symbols and conventions of Backus-Naur Form (BNF) syntax, see Appendix A.