WDC 3.0 has the following components.
The Extensible Protocol Server (EPS) is the server that runs your web data connector. An EPS-based connector is a web application that doesn’t require a web server.
The TACO Toolkit is the command-line interfact that you use to create, build, and package your web data connector. Use the TACO Toolkit to generate template files for a variety of connector types and then edit the files for your specific connector. For more information about creating connectors, see Build a sample web data connector.