Atom

EBNF

Atom = Literal
     | Parameter
     | CaseExpression
     | ((C,O,U,N,T), [SP], '(', [SP], '*', [SP], ')')
     | ListComprehension
     | PatternComprehension
     | Quantifier
     | PatternPredicate
     | ParenthesizedExpression
     | FunctionInvocation
     | ExistentialSubquery
     | Variable
     ;

ParenthesizedExpression = '(', [SP], Expression, [SP], ')' ;

Variable = SymbolicName ;

Referenced from