Task Dependency and Execution Analysis for Web Services Composition

800x600 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} Web Services Composition (WSC)-based applications are widely using in the heterogeneous environment, which has inevitably led to the need for reliable methods for the WSC paradigm. This paper presents a formal definition of Web services composition, and then analyzes task dependency rules of dataflow and behavior in Web services composition net system, finally, we introduce execution semantic of Web services composition net.