HI Sri,
for these 3 2LIS_02_HDR,ITM,SCL data sources are mapped with ..DSO(0PSPO_D1)..
check these links your will get solution
Reporting for SAP SRM - SAP Documentation
http://www.stechno.net/sap-notes.html?view=sapnote&id=1237150
SAP Library - Procurement for Public Sector General
check also content BI 7.03 SP08,and BI Cont 7.03 SP09....
regards,
kamal