The musical performance of a score is a domain rarely addressed in a reasonable level of detail by current digital music editions. A main reason for this may be a lack of suitable data formats that are capable of encoding more than ambiguous performance symbols or rather technical measurement series. The Music Performance Markup format is a recent development that fills this gap. This workshop gives a practical introduction to the format. The core software tool to create performance encodings is MPM Toolbox. Participants familiarise themselves with it during the course of the workshop, have the opportunity to experiment and create their own performance encodings, and give feedback that will motivate future development.