====== $$ Variables ====== A structure is assigned! If you do not want to store exactly one (text) value in a variable, we recommend using the variable instantiated with $$. The difference to the $$ variable is that whole (tree) structures can be stored in the $$ variable. In the following example, the first position is stored in a variable and then assigned the DeliveryDate on the variable. {{:transformation:mappings:variablen:beispiel_.png?|}} {{:images:sign_warning.png?nolink|}}**Note:** $$ variables are also called after instantiating with only one $!\\ {{:images:sign_warning.png?nolink|}}**Note:** Variables can only be reset using the [[en:transformation:mappings:variablen:clearvariable]] mapping function, since a rule with an empty string is not executed.!