Reference Type
A reference type is a reference to a different type. You use a reference type to define the type of reference variables in ABAP Objects. There are several kinds of reference types:
● Reference to a class or an interface
● Reference to a type defined in the Dictionary
● Generic reference to ANY, OBJECT or DATA. A reference of type ANY can point to objects as well as to data.
● Reference to a predefined Dictionary type including the length specification and possibly the decimal places.