MarshalJSON marshals the node into JSON.

NPE_ActionPredicate returns a node representing a negatable predicate expression (NPE) of ActionPredicate.

NPE_StringPredicate returns a node representing NPE StringPredicate.

NPE_TimePredicate returns a node representing NPE TimePredicate.

NPE_UnsignedNumericPredicate returns a node representing NPE UnsignedNumericPredicate.

PE_Object returns a node representing PE Object.

PE_Primary returns a node representing a predicate expression (PE) of primaries.

Primary returns an AST node representing PE Primary.

Query returns an AST node representing an RQL query.

UnmarshalJSON unmarshals the node from json.