This video presents the fundamentals of the UML Use Case Diagram. Then it shows how to draw a Use Case Diagram in Eclipse with Papyrus. Papyrus is an industrial-grade open source Model-Based Engineering tool. Papyrus has notably been used in industrial projects and is the base platform for several industrial modeling tools. Papyrus is graphical editing tool for UML 2 as defined by OMG. Papyrus targets to implement 100% of the OMG specification!