deploy: 63c10a51fc

api/basic_json/is_null.md

@@ -34,6 +34,13 @@ Constant.
     --8<-- "examples/is_null.output"
     ```
 
+## See also
+
+- [is_array](is_array.md) checks whether the JSON value is an array
+- [is_object](is_object.md) checks whether the JSON value is an object
+- [type](type.md) returns the type of the JSON value
+- [value_t](value_t.md) the enumeration of JSON types
+
 ## Version history
 
 - Added in version 1.0.0.