This paper presents a case study of creating a software product line for the train signaling domain. The Train Control Language (TCL) is a DSL which automates the production of source code for computers controlling train stations. By applying the Common Variability Language (CVL), which is a separate and generic language to define variability on base models, we form a software product line of stations. We discuss the process and experience of using CVL to automate the production of three real train stations. A brief discussion about the verification needed for the generated products is also included.
There is an ongoing effort to standardize variability modeling based on the common variability modeling language (CVL) REF , a generic language to define variability.