Context: While industrial use of UML was studied intensely, little is known about UML use in Free/Open Source Software (
FOSS) projects. Goal: We aim at systematically mining GitHub projects to answer the question when models, if used, are created and updated throughout the whole project's life-span. Method: We present a semi-automated approach to collect UML stored in images,. xmi, and. uml files and scanned ten percent of all GitHub projects (1.24 million). Our focus was on number and role of contributors that …