7.1 CE SCA / SDA Confusion

Hi,

I have an ejb app which, naturally, compiles to a jar.

I package this up in a SAP specific EAR, in the SAP Netweaver Developer Studio.

Im slightly confused about what an SDA and an SCA are.

As far as I can tell my SAP specific ear file is an sda, but applications should be deployed as an sca.

How does one go about creating an SCA or have I got the wrong concepts here?

Regards,

Andrew