ALTER TABLESPACE tablespace 
{ datafile_tempfile_clauses
| DEFAULT storage_clause
| MINIMUM EXTENT integer [ K | M ]
| ONLINE
| OFFLINE [ NORMAL | TEMPORARY | IMMEDIATE ]
| { BEGIN | END } BACKUP
| READ { ONLY | WRITE }
| PERMANENT| TEMPORARY
| COALESCE
| { LOGGING | NOLOGGING }
}
;

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