Compound predicate

The following predicates are compound predicates:

• An atomic predicate that operates with another atomic predicate: atomic_predicate binary_logic_operator atomic_predicate
• An atomic predicate that operates with a compound predicate: atomic_predicate binary_logic_operator compound_predicate
• A compound predicate that operates with an atomic predicate: compound_predicate binary_logic_operator atomic_predicate
• An atomic predicate with a unary logical operator: unary_logic_operator atomic_predicate
• A compound predicate with a unary logical operator: unary_logic_operator compound_predicate

The query language defines two binary logical operators:

and
or

The query language defines one unary logical operator:

not