v0.1-M2/chi/reference-manual/rail_diagrams/compare_expression.tex

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\begin{rail}
BooleanExpression : Expression ( EQTK | NETK ) Expression
                  | ( IntegerExpression | RealExpression )
                    ( LTTK | LETK | GETK | GTTK )
                    ( IntegerExpression | RealExpression )
                  | StringExpression ( LTTK | LETK | GETK | GTTK )
                    StringExpression
                  | Expression INKW ( ListExpression | SetExpression
                                    | DictionaryExpression )
                  | ListExpression SUBKW ListExpression
                  | SetExpression SUBKW SetExpression
                  | DictionaryExpression SUBKW DictionaryExpression
                  ;
\end{rail}