boolean_expression ::= [NOT] { boolean_constant_name | boolean_function_call | boolean_literal | boolean_variable_name | other_boolean_form } [{AND | OR} [NOT] { boolean_constant_name | boolean_function_call | boolean_literal | boolean_variable_name | other_boolean_form }] [{AND | OR} [NOT] { boolean_constant_name | boolean_function_call | boolean_literal | boolean_variable_name | other_boolean_form }]...