Task Model-Based User Interface Development

With the development of information technology,the application of the computer is becoming more and more comprehensive.The final show of the user interactive behavior of the application is the user interface,which becomes more and more important,In recent years,in the development of user interface,especially along with the appearance of increasing diversity of all kinds of devices,the ability to migrate executing user interface to another platform has to be improved.A lot of methods for the development of uers interface appeared.Model_based user interface design is an important one.The MOBI-D is carried out to solve complex business processes along with the mature of software engineering.Dislike with traditional software coding,MOBI-D is a procedure of modeling.it emphasizes that get the model through the description of user requirements,and the model mostly makes up with the exist designs and pattern. At last the code is generated from the models with a set of transform regulations automaticly.Such a development methord can be much better to reflect the application of design pattern,and enrich the experience of development team,and also good for the team to response the change of user requirement more quickly and exactly.Especially because most of software designs are transform from exist solutions,the quality and costs of the product can be easily controlled.In this paper,we explore the questions of Model_Based User Interfaces Design.We choose two typical model:the task model and dialog model.We focus on the task model and describe the funcation of user interface with the Concur Task Trees(CTT).At the same time,we use the dialog model to define a sequence of user interactions.We formalize the activity chain as a State Transition Network(STN)and in addition this chain can be partically extracted out of the task specification.We benefit of this approach since the task and dialog model are consistent.We get an algorithm to derive a STN from a CTT according to reverse order and validate ir in a mature environment:TERESA.The task model is formalized as a CTT and the activity chain is formalized as a STN.We also do some research for the combination and split of the STN derived from the algorithm in the multi-device environment.