multiple entries in single input parameter

Hi,

I have some doubts, I have made an input parameter which selects a date n gives the data of that particular date. I have successfully pass it

to BO but now I have to pass it to cognos is it possible? if yes then how to do so..

Second question is.. my requirement is like.. I have to show week wise data to user so Is it possible to pass more than one value in input parameter?

Or any other way to show weekwise data through input parameter. my input parameter is taking the date between two columns, START_DATE

and END_DATE.

for ex: As on 1st dec 2013 whatever is the value of different columns coming from different tables that will be displayed.

Please help me in displaying week wise data.

Regards

Karishma