@@ -155,6 +155,12 @@ A MathJSON expression is a combination of **numbers**, **symbols**, **strings**,
155155{"fn" : [" Add" "num" :" 1" "sym" :" x"
156156```
157157
158+ ** Dictionary**
159+
160+ ``` json example
161+ {"dict" : {"x" :2 ,"y" :3 }}
162+ [" Dictionary" " Tuple" " 'x'" 2 ], [" Tuple" " 'y'" 3 ]]
163+ ```
158164
159165** Numbers** ,** symbols** ,** strings** and** functions** are expressed either as
160166object literals with a` "num" ` ` "str" ` ` "sym" ` or` "fn" ` key, respectively, or
@@ -742,8 +748,8 @@ its arguments being tuples of key-value pairs.
742748
743749``` json example
744750[" Dictionary"
745- [" Tuple" " x " 120 ],
746- [" Tuple" " y " 36 ]
751+ [" Tuple" " 'x' " 120 ],
752+ [" Tuple" " 'y' " 36 ]
747753]
748754```
749755
@@ -754,8 +760,8 @@ For example, the following dictionary contains an expression and a list as value
754760
755761``` json example
756762[" Dictionary"
757- [" Tuple" " expression" " Add" " x" 1 ]],
758- [" Tuple" " list" " List" 1 ,2 ,3 ]]
763+ [" Tuple" " ' expression' " " Add" " x" 1 ]],
764+ [" Tuple" " ' list' " " List" 1 ,2 ,3 ]]
759765]
760766```
761767