<table specification> [ {, <table specification>
| <qualified join table specification> }... ]
<class specification>
[ <correlation> ]
| <meta class specification>
[ <correlation> ]
| <subquery> <correlation>
| TABLE ( <expression> ) <correlation>
[ AS ] <identifier>
[ ( <identifier comma list> ) ]
[ INNER | { LEFT | RIGHT [ OUTER ] ] JOIN <table specification>
[ <join condition> ]
ON <search condition>
CLASS
| TABLE
| VCLASS
| VIEW
<single class specification>
| ( <single class specification comma list> )
[ ONLY ] <class name>
| ALL <class name>
[ ( EXCEPT <class specification comma list> ) ]
CLASS <class name>