Cast Iron CDK .par file
Your plug-in is packaged as a .par file. Your .par is a standard .zip file that you rename and import into Studio.
The .par file contains your plug-in. It is exported from your Studio project and is where you implement the interface operations that enable you to identify and inventory objects contained in your plug-in. When your .par is delivered, it automatically expands into a directory for your plug-in.