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Mathematical Problems in Engineering
Volume 2014, Article ID 407809, 9 pages
http://dx.doi.org/10.1155/2014/407809
Research Article

Measuring Semantic and Structural Information for Data Oriented Workflow Retrieval with Cost Constraints

School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China

Received 20 February 2014; Revised 13 April 2014; Accepted 28 April 2014; Published 23 June 2014

Academic Editor: M. Chadli

Copyright © 2014 Yinglong Ma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The reuse of data oriented workflows (DOWs) can reduce the cost of workflow system development and control the risk of project failure and therefore is crucial for accelerating the automation of business processes. Reusing workflows can be achieved by measuring the similarity among candidate workflows and selecting the workflow satisfying requirements of users from them. However, due to DOWs being often developed based on an open, distributed, and heterogeneous environment, different users often can impose diverse cost constraints on data oriented workflows. This makes the reuse of DOWs challenging. There is no clear solution for retrieving DOWs with cost constraints. In this paper, we present a novel graph based model of DOWs with cost constraints, called constrained data oriented workflow (CDW), which can express cost constraints that users are often concerned about. An approach is proposed for retrieving CDWs, which seamlessly combines semantic and structural information of CDWs. A distance measure based on matrix theory is adopted to seamlessly combine semantic and structural similarities of CDWs for selecting and reusing them. Finally, the related experiments are made to show the effectiveness and efficiency of our approach.