Concatenation of Oracle DAC parameters on the fly

In Oracle Data warehouse administration Console, the parameters used for dynamic loading the data can not be of length more than 2000 in case of text parameters, such as the $$SET_OF_BOOKS_ID_LIST parameter in Oracle BI Apps, then parameters concatenation feature of DAC can be used to produce a parameter that is more than 2000 characters in length. We can concatenate DAC parameter using @DAC_<parameter_name> syntax. Suppose there are two parameters SET_OF_BOOKS_ID_LIST1 and SET_OF_BOOKS_ID_LIST2, then we can concatenate the two parameters and assign it to third parameter $$SET_OF_BOOKS_ID_LIST. In the value for $$SET_OF_BOOKS_ID_LIST put,

@DAC_SET_OF_BOOKS_ID_LIST1,@DAC_SET_OF_BOOKS_ID_LIST2

and you are done.