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Abstr act Service orchestration logics can be difficult to be totally pre-fabricated as composite services when facing uncertain requirements. It is sometimes indispensable to get end users involved. However, we should not expect end users do programming as computer professionals. They should be refrained from the difficulties in selecting suitable services, jointing the inputs and outputs, and assuring correctness and consistence. It is thus important to provide them proper assistance anddoi:10.1109/icebe.2007.91 dblp:conf/icebe/YanHWL07 fatcat:pyqk5tk52zf5fbcbyxkfe3yuk4