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Research Interests:
Web services are emerging as a promising technology for the effective automation of inter-organizational interactions. However, despite the growing interest, several issues still need to be addressed to provide Web services with benefits... more
Web services are emerging as a promising technology for the effective automation of inter-organizational interactions. However, despite the growing interest, several issues still need to be addressed to provide Web services with benefits similar to what traditional middleware brings to intra-organizational application integration. In this paper, we present a framework that supports the model-driven development of Web services. Specifically, we show how, starting from the external specifications of a Web service (e.g., interface and protocol specifications), we can support the generation of extensible service implementation templates as well as of complete (executable) service specifications, thereby considerably simplifying the service development work.
Research Interests: Informatics, Service Oriented Architecture, Telecommunications, XML, Web Services, and 18 moreApplication Integration (Computer Science), Reverse Engineering, Standardization, XML Schema, UML, Model Driven Development, Advanced Traffic Information Systems, Open Systems, Web Service, Context Modeling, Protocol Specification, Unified Modeling Language, Development Process, Composite Web Service, Model Driven Architecture, Internet, Web Service Description Language (WSDL), and Model integration
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... 15. Qiming Chen , Meichun Hsu, Inter-Enterprise Collaborative Business ProcessManagement, Proceedings of the 17th International Conference on Data Engineering, p.253-260, April 02-06, 2001. 16. {16} WM Coalition. Terminology and... more
... 15. Qiming Chen , Meichun Hsu, Inter-Enterprise Collaborative Business ProcessManagement, Proceedings of the 17th International Conference on Data Engineering, p.253-260, April 02-06, 2001. 16. {16} WM Coalition. Terminology and glossary. ...
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Web services are emerging as a promising technology for the effective automation of inter-organizational interactions. Several standards that aim at providing infrastructure to support Web services description, discovery, and composition... more
Web services are emerging as a promising technology for the effective automation of inter-organizational interactions. Several standards that aim at providing infrastructure to support Web services description, discovery, and composition have recently emerged including WSDL, UDDI, and BPEL4WS. Indeed, advances in this area promise to take cross-organizational application integration a step further by facilitating the automatic discovery and invocation of relevant services. However, despite the growing interest in Web services, several issues still need to be addressed to provide similar benefits to what traditional middleware brings to intra-organizational application integration (e.g., transaction support). In this paper, we identify a framework for defining extended service models to enable the definition of richer Web service abstractions. We also identify and define specific abstractions based on an analysis of existing e-commerce Web portals. Finally, we show how the model and the abstractions are supported by a conversation manager implemented on top of the SELF-SERV platform.
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One of the challenging problems that Web service technology faces is the ability to effectively discover services based on their capabilities. We present an approach to tackling this problem in the context of description logics (DLs). We... more
One of the challenging problems that Web service technology faces is the ability to effectively discover services based on their capabilities. We present an approach to tackling this problem in the context of description logics (DLs). We formalize service discovery as a new instance of the problem of rewriting concepts using terminologies. We call this new instance the best covering problem. We provide a formalization of the best covering problem in the framework of DL-based ontologies and propose a hypergraph-based algorithm to effectively compute best covers of a given request. We propose a novel matchmaking algorithm that takes as input a service request (or query) Q and an ontology \(\mathcal{T}\) of services and finds a set of services called a “best cover” of Q whose descriptions contain as much common information with Q as possible and as little extra information with respect to Q as possible. We have implemented the proposed discovery technique and used the developed prototype in the context of the Multilingual Knowledge Based European Electronic Marketplace (MKBEEM) project.
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Web mashups are Web applications developed using contents and services available online. Despite rapidly increasing interest in mashups, comprehensive development tools and frameworks are lacking, and in most cases mashing up a new... more
Web mashups are Web applications developed using contents and services available online. Despite rapidly increasing interest in mashups, comprehensive development tools and frameworks are lacking, and in most cases mashing up a new application implies a significant manual programming effort. This article overviews current tools, frameworks, and trends that aim to facilitate mashup development. The authors use a set of characteristic dimensions to highlight the strengths and weaknesses of some representative approaches.
Research Interests: Distributed Computing, Web Services, Mashups, User Interface, Application Integration (Computer Science), and 9 moreReverse Engineering, Composition, Component Based Software Development, Data Integration, Tool Development, IEEE Internet Computing, Compositional Data, Web Application Development, and Internet
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The development of new Web services through the composition of existing ones has gained a considerable momentum as a means to realise business-to-business collaborations. Unfortunately, given that services are often developed in an ad hoc... more
The development of new Web services through the composition of existing ones has gained a considerable momentum as a means to realise business-to-business collaborations. Unfortunately, given that services are often developed in an ad hoc fashion using manifold technologies and standards, connecting and coordinating them in order to build composite services is a delicate and time-consuming task. In this paper, we describe the design and implementation of a system in which services are composed using a model-driven approach, and the resulting composite services are orchestrated following a peer-to-peer paradigm. The system provides tools for specifying composite services through statecharts, data conversion rules, and multi-attribute provider selection policies. These specifications are interpreted by software components that interact in a peer-to-peer way to coordinate the execution of the composite service. We report results of an experimental evaluation showing the relative advantages of this peer-to-peer approach with respect to a centralised one.
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Abstract The growth of Internet technologies has unleashed a wave of innovations that are having tremendous impact on the way organisations interact with their partners and customers. It has undoubtedly opened new ways of automating... more
Abstract The growth of Internet technologies has unleashed a wave of innovations that are having tremendous impact on the way organisations interact with their partners and customers. It has undoubtedly opened new ways of automating Business-to-Business ( ...
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Research Interests:
One of the challenging problems that Web service technology faces is the ability to effectively discover services based on their capabilities. We present an approach to tackle this problem in the context of DAML-S ontologies of services.... more
One of the challenging problems that Web service technology faces is the ability to effectively discover services based on their capabilities. We present an approach to tackle this problem in the context of DAML-S ontologies of services. The proposed approach enables to select the combinations of Web services that best match a given request Q and effectively computes the extra information with respect to Q (e.g., the information required by a service request but not provided by any existing service). We study the reasoning problem associated with such a matching process and propose an algorithm derived from hypergraphs theory.
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The push toward business process automation has generated the need for integrating different enterprise applications involved in such processes. The typical approach to integration and to process automation is based on the use of adapters... more
The push toward business process automation has generated the need for integrating different enterprise applications involved in such processes. The typical approach to integration and to process automation is based on the use of adapters and message brokers. The need for adapters in Web services mainly comes from two sources: one is the heterogeneity at the higher levels of the interoperability stack, and the other is the high number of clients, each of which can support different interfaces and protocols, thereby generating the need for providing multiple interfaces to the same service. In this paper, we characterize the problem of adaptation of web services by identifying and classifying different kinds of adaptation requirements. Then, we focus on business protocol adapters, and we classify the different ways in which two protocols may differ. Next, we propose a methodology for developing adapters in Web services, based on the use of mismatch patterns and service composition technologies.
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We develop an agent-based cross-enterprise Workflow Management System (WFMS) which can integrate business processes on user’s demand. In our approach, business processes are wrapped by service agents. Based on users’ requirements, the... more
We develop an agent-based cross-enterprise Workflow Management System (WFMS) which can integrate business processes on user’s demand. In our approach, business processes are wrapped by service agents. Based on users’ requirements, the integration agent contacts the discovery agent to locate appropriate service agents, then negotiates with the service agents about task executions. Ac ost model is proposed which allows the integration agent to update execution plan and integrate service agents dynamically.
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Research Interests: Information Systems, Computer Science, Service Oriented Computing, Linear Programming, Integer Programming, and 21 moreRouting, Web Services, Computer Security, Middleware, Web Services and SOA, Computer Software, Business and Management, QoS, Quality of Service, Liquid State Machine, Enterprise Information Systems, Service, Time Delay, Web service composition, Mathematical Model, Publish/subscribe, Web Service, Availability, Cost Function, Internet, and Electronic Commerce
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The development of newWeb services by composition of existing ones is becoming a widespread approach to realise business-to-business collaborations. The composite services obtained in this way are then eventually used in other... more
The development of newWeb services by composition of existing ones is becoming a widespread approach to realise business-to-business collaborations. The composite services obtained in this way are then eventually used in other compositions. Given the dynamic nature of the Web, this recursive composition of services rapidly leads to intricate dependencies between them. On the other hand, businesses need to track the executions of their composite services in order to ensure explainability in case of failure and to support decision making. This paper deals with the issue of tracing composite service executions over the Web. It describes a model and an XML representation of service execution traces, an approach for collecting and storing these traces in a distributed environment, and an approach to evaluate queries over distributed repositories of traces.
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The development of new services through the integration of existing ones has gained a considerable momentum as a means to create and streamline business-to-business collaborations. Unfortunately, as Web services are often autonomous and... more
The development of new services through the integration of existing ones has gained a considerable momentum as a means to create and streamline business-to-business collaborations. Unfortunately, as Web services are often autonomous and heterogeneous entities, connecting and coordinating them in order to build integrated services is a delicate and time-consuming task. In this paper, we describe the design and implementation of a system through which existing Web services can be declaratively composed, and the resulting composite services can be executed following a peer-to-peer paradigm, within a dynamic environment. This system provides tools for specifying composite services through. statecharts, data conversion rules, and provider selection, policies. These specifications are then translated into XML documents that can be interpreted by peer-to-peer inter-connected software components, in order to provision the composite service without requiring a central authority
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Business-to-Business (B2B) technologies pre-date the Web. They have existed for at least as long as the Internet. B2B applications were among the first to take advantage of advances in computer networking. The Electronic Data Interchange... more
Business-to-Business (B2B) technologies pre-date the Web. They have existed for at least as long as the Internet. B2B applications were among the first to take advantage of advances in computer networking. The Electronic Data Interchange (EDI) business standard is an illustration of such an early adoption of the advances in computer networking. The ubiquity and the affordability of the Web has made it possible for the masses of businesses to automate their B2B interactions. However, several issues related to scale, content exchange, autonomy, heterogeneity, and other issues still need to be addressed. In this paper, we survey the main techniques, systems, products, and standards for B2B interactions. We propose a set of criteria for assessing the different B2B interaction techniques, standards, and products.