Hi Geetha,
While creating the 'Site' in Administration Console transaction, in the dropdown feature of the 'Site type' there is a mentioning about the XML or IDOC or Groupware or Mobile client. This defines the Site with their respective type. Now the problem with the XML is done. The subscription and Publication features deals with the notifications from/to the destinations.
In CRMXIF_C1, it is enough to specify the Site Name ( where the Inbound and Outbound processings are taken care of ) with the BDoc type you prefer ( BUPA_MAIN / PRODUCT_MAT ) and the interface name ( CRMXIF_PARTNER_SAVE / CRMXIF_PRODUCT_MATERIAL_SAVE ).