BLOB in CREATE_DEEP_ENTITY

Hi There,

I created a OData service to create a shopping cart in SAP SRM system. The Service has two entity sets Header and Item. I implemented the method CREATE_DEEP_ENTITY for creating the shopping cart with both header and item at the same time. Till here I am able successfully test it. Now I want to send attachments and wanted to know how to handle attachments in the Data Provider Class..

1. Do I need to use CREATE_STREAM method or CREATE_DEEP_ENTITY method?

2. If I use CREATE_STREAM method, will it be called after CREATE_DEEP_ENTITY in a POST call.

Thanks,

Chan