Includes bibliographical references (pages 188-201) and index.
"Diagram editing is an attractive application of gestural interfaces and pen-based computers which promise a new input paradigm where users communicate with computers in diagram languages by using gestures. In this thesis, the key ides of the incremental and the cooperative recognition, the gesture specificaiton and the structure recognition, as well as decoupling the recognition interface from the command interface."--Preface.