Allowed Variable Types in XojoScripts

According to the Language Reference, XojoScript only allows the following variable types:

Integer
Single
Double
Boolean
String
Color
Object
Variant

However, it seems to not only accept declarations of type Currency but manipulation of variables of type currency. Has the use of currency been
deprecated, or is this just an error in the Language reference?

Currency is fine.

I updated the page to include Currency: http://documentation.xojo.com/index.php/Scripting_Language#Data_Types