How to access one components data in another component?

Hi Experts,

Could any one explain me how can I access one comonents data in another component?

Example : I need to access Marketting attributes data (this is present in component BP_DATA ) while saving. But the SAVE botton exists in BP_HEAD component.

So I need to access BP_DATA's data in BP_HEAD component.

Thanks in advance.

Thanks,

Munikumar.