Introduction to the Case Management Model and Notation (CMMN)
  This is a short tutorial of the Case Management Model and Notation (CMMN) version 1.0. It is targeted to readers with knowledge of basic process or workflow modeling, and it covers the complete CMMN notation. A simple complaints process is used to demonstrate the notation. At the end of the tutorial the reader will be able to understand and create CMMN models. An appendix summarizing the notation is included for reference purposes. 
Mike A. Marin
cs.SE