use dataset item for parameter default value

HSMorales

I am working on a report that lists employee information returned from a stotred procedure.

We'll call this dataset "dsEmpl_Info".

dsEmpl_Info is linked to parameters "Start_Date" and "End_Date" both of which are input Date type parameters.
They each have a date picker to select dates.

I also have datasets "dsSTART_DATE" and "dsEND_DATE" which retreive the starting and ending dates of the previous accounting period based on the current date.
These datasets each have computed columns that convert the returned dates to format MM/dd/yyyy.

I would like to set the default value of "Start_Date" to an item in "dsSTART_DATE" and the default value of "End_Date" to an item in "dsEND_DATE".

The user can then run the report for the previous accounting period or for any time frame they wish.

Is there a way to do this ??

I am running BIRT version 3.7.0


Thanks for you help.