A composite shell is an SCA assembly file that contains one component. The implementation of the component is another SCA assembly file.
Generally, the composite shell is used to set the deployment configuration of the included composite (bindings).
To generate a composite shell from an existing SCA assembly file:
Right-click an existing SCA Composite Model and select SCA > Generate Composite Shell....
In the Initialize new SCA Composite Shell file wizard, select your output directory. Type a unique name for the composite in the File name field and click Finish.