The Ccs package contains interfaces, enums and classes defined by the CCS Specifications. Since OpenEdge Release 11.7.2, this code is also shipped by Progress Software, as both source and rcode, and so does not need to be built or included in as part of a deployment.
We include those files in our deployment to simplify developers to get insight into the types.
For more details on the CCS Specs, visit CCS on Github.