Cross Platform Interface Description Language (XPIDL) is the interface definition language developed by Mozilla.org to specify XPCOM interfaces.Proceedings: 10th IEEE International Conference on Engineering of Complex
It is similar to the Object Management Group's CORBA IDL.
Mozilla provides a utility xpidl that converts the IDL files into XPCOM Type Library (.xpt) files.
References
External links , developer.mozilla.org Adding XPIDL interface files to the build process, mozilla.org Creating XPCOM components with JavaScript , Phillip Perkins