Service Interface Deployment Package

A service interface deployment package is contained in a COBOL Archive (.car) file, which is a standard zip archive that includes the following:
manifest file
An XML document that contains deployment information such as the name of the service and a description of the .car file.
interface definition table
A file that describes the service interface. The file extension is .idt.
specified package files
Other files optionally added to the package.

The name of a deployment package file is myservice.car where myservice is the name of your service interface. By default, Enterprise Developer generates the .car file in your project's myservice\myservice.deploy directory.