http://www.computer.org/scc en-us Tue, 16 Dec 2008 14:42:42 GMT http://csdl.computer.org/common/images/logos/scc.gif List of recently published journal articles http://www.computer.org/scc http://doi.ieeecomputersociety.org/10.1109/SCC.2005.8 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.8 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.2 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.2 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.62 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.62 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.64 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.64 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.38 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.38 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.112 We address the question, "In the brave new world of Web services and service-oriented architectures (SOA), how does data fit in?" We bring data modeling concepts to bear on the world of services, yielding an approach in which enterprise data access is handled by a collection of interrelated data services. We show how the approach can be realized on a foundation of XML standards, namely XML Schema, Web services, and XQuery. We show that this approach provides a uniform and declarative framework for integrating enterprise data assets that are drawn from disparate underlying sources, including both queryable and non-queryable data sources as well as data that is encapsulated by Web services. We also show that the approach yields data services that are easily and efficiently reusable. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.112 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.108 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.108 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.89 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.89 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.53 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.53 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.90 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.90 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.85 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.85 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.75 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.75 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.51 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.51 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.66 The emergence of Web services and Service-Oriented Architecture (SOA) makes application development easy. However, since the computing environments on which applications are running are becoming complex, it is harder for users to set up security properly. Considering such complex security environments, this paper describes a tooling framework to generate Web services security configurations using Model Driven Architecture (MDA). According to the MDA concept, users simply add security intentions to an application model, and then detailed security configurations are generated, employing transformations over UML constructs and a security environment model. In order to demonstrate that the framework is practically useful, we also illustrate how to generate configuration files for a commercial product. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.66 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.77 Recent accounting scandals involving firms such as such as Enron, Worldcom, Tyco etc. have resulted in the emergence of stringent regulations aimed at safeguarding the interest of enterprise stakeholders. Important regulations such as Sarbanes-Oxley Act (SOX), the US PATRIOT act in US and the International Accounting Standards (IAS) regulation in Europe have diverse and far reaching effects. Organizations are mandated to comply with these regulations by producing certain documents and reports during the audit. This calls for appropriate extensible document lifecycle management solutions involving integration and reconciliation of stored data from heterogeneous sources with quick detailing. This is because these regulations demand easy accessibility of data. While point solutions to document life cycle management exist, they are not cost effective. The paradigm of Service Oriented Architecture (SOA) which emphasizes software development based on well abstracted services has presented application development and adaptation a new dimension. SOA will enable flexible deployment of shared reusable compliance services thereby yielding malleable and cost effective compliance solutions. In this paper, we provide a logical SOA based approach for achieving compliance in enterprises and illustrate this approach for a typical compliance need. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.77 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.104 In peer-to-peer (P2P) environments, a peer needs to interact with unknown peers for the services provided. This requires the trust evaluation prior to and posterior to interactions. This paper presents Trust2: a novel and dynamic peer trust evaluation model, which aims to measure the credibility of peers' recommendations, and thus to filter noise in responses and obtain more accurate and objective trust values. In our model, prior to any interaction, the trust value results from the evaluations given by other peers. Posterior to interactions, the trust values results from both other peers' evaluations and the requesting peer's experience. In the aggregation of trust evaluations, the weight to the requesting peer becomes higher and higher. Meanwhile, during this process, the credibility of each responding peer's recommendation can be measured round by round. This leads to the filtering of low credibility peers and the improvement of trust evaluations. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.104 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.57 The Gridcast project is pioneering the use of grid and web technologies to prototype the next generation of broadcast media infrastructure. The project has a physical network infrastructure that connects BBC Northern Ireland, BBC R&D in London, the Belfast e-Science Centre and the emerging UK grid infrastructure. This physical network infrastructure is being used to test grid and web services that manage a television broadcast infrastructure; that is, an infrastructure that manages a collection of broadcast schedules to be transmitted to viewers and that contains a mix of live and recorded video. Broadcasting is a highly demanding industry with high levels of reactivity and robustness required in its infrastructure it is a significant test of current grid and web technologies. The project has implemented schedule-based transport of recorded video between broadcast locations that assumes a highly reactive broadcasting environment, the remote, secure use of technical resources and the automation of broadcast and production workflows. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.57 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.55 GeneGrid is a collaborative industrial grid computing R&D project initiated by the Belfast e-Science Centre (BeSC) under the UK e-Science programme and supported by the UK Department of Trade & Industry (DTI). GeneGrid includes commercial partners who provide real business engagement. The project aims to provide a platform for scientists to access their collective resources, skills, experiences and results in a secure, reliable and scalable manner through the creation of a "Virtual Bioinformatics Laboratory". GeneGrid provides seamless integration of a myriad of heterogeneous applications and datasets that span multiple administrative domains and locations across the globe, and presents these to the scientist through a simple user friendly interface. This paper will present each of the five main GeneGrid components, and discuss how these components are integrated to form an advanced Service Oriented Architecture for automatic and dynamic in silico experiment execution. A commercial use case as provided by our industrial partners will also be discussed. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.55 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.103 Grid computing that has developed with the aim of high-end computing has extended to commercial areas as the enabler of cost and risk minimization for IT resources. To actualize larger benefit from Grid by widening Grid adoption, the formation of trust relationship among participants is one of the most important components that should be concerned. While trust mechanisms among distributed nodes have been studied, the related works are rather theoretical and conceptual than applicable to practical commercial Grid. Based on this observation, we classify trust depending on distinctive requirements in practical Grid utilization, and improve the evaluation process of trust by suggesting integrated measuring methods. We also introduce the ways for practical use of evaluated trust by guaranteeing individuals' manageability. Finally, we describe the process for eliciting system constituents' trust requirements and validating suggested architecture, which will be conducted in the next phase of this research. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.103 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.41 Grid computing has been touted as an emerging revolution that will transform the enterprise information technology landscape by enabling organizations to share access to computing systems and data across organizational boundaries. The promised benefits include increased utilization of otherwise idle computing systems, and sharing data between organizations in a seamless but secure fashion. If these promises are fulfilled, grids can enable business partners to create virtual organizations with unique competitive advantages that will be difficult to imitate. However, there are a number of technical and business challenges that must be overcome before the benefits of grid computing can be realized. In particular, this paper will analyze how contractual issues and government regulations can impact grid computing projects. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.41 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.99 A goal driven intention extraction approach is proposed to automate the process of extracting user intention from the original Web service request terms. We introduce a method for analyzing the request terms to fit user intension, so that the service provided will be more suitable for the user. The input terms will be parsed into different word sense sets. With the lexical dictionary and domain ontology, possible senses of the terms will be identified. A goal structure is constructed to help the identification of goal models which represent the user intention. By combining the information of request terms and goal structures, one or more goal models will be identified. A goal selector will select a candidate goal model from generated goal models to represent the user intention. A service request agent is designed to generate and execute plans to satisfy the goals. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.99 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.49 In this paper, we present a scalable authorization service, based on the concept of fine-grained access control (FGAC), for large-scale Grid infrastructures that span multiple independent domains. FGAC enables participating resource owners to specify fine-grained policies concerning which user can access can their resources under which mode. We argue that such an authorization service must be integrated with the resource broker service to avoid scheduling requests onto resources which do not authorize the user request. For this reason, we develop a novel resource broker service that integrates access control with resource scheduling. In our system, both resource owners and users define their resource access and usage policies. The resource broker schedules a user request only within the set of resources whose policies match the user credentials (and vice-versa). Since this process of evaluating authorization policies of resources and user, in addition to checking the resource requirement, can be a potential bottleneck for a large scale Grid, we also analyze the problem of efficient evaluation of FGAC policies. In this context, we present a novel method for policy organization and compare its performance with other strategies. Preliminary results show that the proposed method can significantly enhance performance. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.49 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.60 In this paper, we introduce and explore a new computing paradigm we call knowledge as a service, in which a knowledge service provider, via its knowledge server, answers queries presented by some knowledge consumers. The knowledge server's answers are based on knowledge models that may be expensive or impossible to obtain for the knowledge consumers.While this new paradigm of computing is promising, we must establish a solid foundation to ensure its utility. We focus on the security aspect of the paradigm, and particularly on the problem we call knowledge breaching attack, which may allow an adversary to recover the knowledge underlying a knowledge service. Without being able to adequately handling such an attack, the knowledge service providers would never have any economic incentives to develop such a paradigm. Unfortunately, this paper theoretically shows that any interesting knowledge is subject to the knowledge breaching attack, and empirically shows that some knowledge models could be breached after a very small number of queries (e.g., 0.2- 1% portion of the domain). Thus we need to investigate technical means that can alleviate such powerful attacks (at least for most practical knowledge models). http://doi.ieeecomputersociety.org/10.1109/SCC.2005.60 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.46 In this paper we propose an extension of the Service Oriented Architecture that supports discovery of Web services across organization boundaries. We provide a detailed discussion of both the architectural and implementation considerations, and we provide an empirical evaluation that shows that indeed our prototype implementation scales with both the number of Web services and the number of organizations involved. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.46 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.69 The paradigm of automated e-service composition through the integration of existing services promises a fast and efficient development of new services in cooperative business environments. Although the "why" part of this paradigm is well understood, many key pieces are missing to utilize the available opportunities. Recently "e-service communities" where service providers with similar interests can register their services are proposed towards realizing this goal. In these communities, requests for services posed by users can be processed by delegating them to already registered services, and orchestrating their executions. We use the service framework of the "Roman" model and further extend it to integrate activity processing costs into the "ad hoc" delegation computation. We investigate the problem of efficient processing of service requests in service communities and develop polynomial time ad hoc delegation techniques guaranteeing optimality. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.69 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.40 The increasing ubiquity of wireless mobile devices is promoting unprecedented levels of electronic collaboration among devices interoperating to achieve a common goal. Issues related to host interoperability are addressed partially by the service-oriented computing paradigm. However, certain technical concerns relating to reliable interactions among hosts in ad hoc networks have not yet received much attention. We introduce follow-me sessions, where interactions occur between a client and a service, rather than a specific provider or server. We allow the client to switch service providers, if needed. We exploit strategies involving the use of contextual information, strong process migration, context-sensitive binding, and locationagnostic communication protocols. We show how follow-me sessions mitigate issues related to proxy-based service-oriented architectures in ad hoc networks. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.40 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.83 The evolution of wireless network technology has led to an increasing number of applications for mobile use. In addition, the paradigm of service-oriented architectures allows a composition of applications based on distributed web services. By using registries it becomes possible to choose the appropriate services at runtime. It needs to be considered that services for mobile use may have different scopes. For instance, routing or weather services may be dedicated to a specific region so that they may be useless if a user's area of interest does not match the service's scope. It is hence necessary to identify and use those services with a scope that corresponds to the relevant context such as a user's location. Moreover, if the context changes, it is desirable to automatically switch between different equivalent service instances to provide a user with a continuous connection to a desired service. We denote this mechanism as service roaming. This paper presents the major concepts needed for service roaming as well as a roaming model based on n-dimensional context spaces. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.83 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.65 This work proposes a novel model where multimedia contents with their related services (business processes and functions) are packaged together as mobile agents. This is intended to enable content providers both to encapsulate their contents and to provide value-added services, for ?exible content editing, delivery, and presentation. In addition, agents encapsulating contents/services can contain other agents in themselves (synthesis of agents). A mobile agent compound integrating multiple contents/services can be thus dynamically formed, in which multiple agents work cooperatively and migrate together as a unit. This paper also describes our proposedMAFEH/WS framework for the model. Agents in the model can be developed by incorporating simple parameter settings for synthesis control into business process descriptions in BPEL4WS. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.65 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.84 The paper reports on research to design and implement a service-based, secure collaborative workflow system for Distributed Aircraft Maintenance Environment (DAME). This has been developed by the Universities of York, Sheffield, Oxford and Leeds, and industrial partners, Rolls-Royce and Data Systems and Solutions (DS&S). DAME is a prototype system to support aircraft engine maintenance and predictive services. It is an example of a virtual organisation with grid-based services running at the four universities sites. To meet the industrial requirements strong security is implemented to protect commercially sensitive services and data. Application services have been coordinated using the DAME workflow management system to automate business processes and control collaborative access. A dynamic workflow-team policy is used to authorise user access to workflow instances and corresponding service instances. The paper includes aspects of an initial evaluation with the industrial participants and illustrates the feasibility of using DAME in an industrial environment. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.84 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.101 Service-Oriented Architectures (SOAs) are fundamentally changing the way in which we conceptualize and design business applications. An SOA-based application typically composes various distributed functions, including some possibly provided by external parties such as independent businesses. The key advantage of SOAs is the resulting dynamism, since the composed parts can be readily swapped out in favor of others of like functionality. SOA environments thus reflect the dynamism of human socioeconomic environments where businesses interact, collaborate, and expose services to each other in order to jointly create value. This paper presents a multiagent model for Web services and catalogs architectural styles that are key for SOA applications. It conceptually evaluates the styles by showing the kinds of service usages and the resulting dynamic interactions that they enable. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.101 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.74 Service oriented computing has gained a considerable momentum as a new paradigm for building enterprise information systems. Notable efforts have been made recently from both researchers and industrials to support the construction of service-based applications, nevertheless several issues still need to be tackled including service de?nition and adaptation, and services orchestration. This work proposes PYROS, an environment for building and orchestrating open services. An open service is represented by a workflow that coordinates calls to service provider methods. Thereby component activities and the way they are synchronized are rendered visible. In order to finely orchestrate services, they are associated with entry points. An entry point acts as a gateway for inserting and getting information about the progress of service execution. The paper details the approach adopted by PYROS for building and orchestrating services, and presents associated architectural choices. Furthermore, it reports an experimentation that we conducted for implementing an eTrader application using PYROS. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.74 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.98 Application integrations employ interacting software components and services. Components - distributed, black-box, processing elements - may have distinct communication styles. Services can be used to augment the interaction of components to deliver on a common task. Unfortunately, there exist scenarios where components and services do not interact congenially. At issue is the service design that, even with standards in place, may ignore important aspects of component communication expectations. Thus, a complete integration is not achieved without implementing ad hoc glue code external to the design strategy. Introducing glue code, without design traceability, limits control, dynamism, and upgrades to components and services. We specify templates for framing glue code as integration completion functions (ICFs). Uniform designs are given using multiple modeling techniques to foster compilation of an ICF repository, where their instantiation can be plug-ins to application integrations. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.98 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.102 Two practical paradigms are presented, which facilitate domain concepts to be directly used to model business operations: the first paradigm is based on the business artifacts and their life cycle; the second paradigm is based on the business tasks and their sequencing. Transformation is an effective way to bridge the gap between business level analysis and IT solutions. We present algorithms that transform business process models based on these two paradigms into IT solutions of web service platform. The specific problems we addressed in this transformation are: 1) how to generate the implementation code of an optimal size; 2) how to preserve the natural structure of business process models in the generated code. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.102 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.54 With the rapid deployment of e-services, many workflow-like e-business process definition languages come into existence. At the same time, Ontology Web Language for Services (OWL-S) aims to build an ontology language to support the integration of various specifications. There has been some work on mapping WSDL (Web Services Description Language) to OWL-S to build a connection between the Web service and service profile. However, in the sense of activity relationships, there has been no effort so far trying to build the OWL-S service model from a workflow process model. Therefore, we design and develop an innovative mapping tool to translate BPEL4WS (Business Process Execution Language for Web Services) to OWL-S. Through this mapping, semantics in the traditional business process specifications can be enriched significantly to enable more flexible and automatic e-service functions by using existing OWL-S tools such as composition and discovery, especially the execution of workflow-based services. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.54 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.27 The web service is a main working pattern and a significant application model for next generation Internet application. The service-oriented architecture is a very promising architecture for practical implementation of the next generation geographical information systems. This paper investigated the service-oriented architecture for constructing a distributed and web service enabled geographical information platform. The GIS platform architecture is designed as a multi-layer architecture that integrates the web service, Servlet/JSP functions and GIS APIs based on the framework of J2EE infrastructure. The web service framework was applied to the GIS system design and implementation. GIS web services were designed to provide the hosted spatial data and GIS functionality to integrate the customized GIS applications to perform basic geo-processing tasks, such as address matching, map image display, and routing, without maintaining GIS tools or the associated geographical data. The system architecture, functions, system integrations, and some key technical problems were investigated. It has an important application prospect in the GIS tools development and application. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.27 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.18 Managing operational and semantic interdependencies among software services is a relativley unexplored topic, despite its relevance to automating service deployments and to increased availability. In this paper we decsribe a framework fro structured and programmatic dependency management among services written in the Java programming language. The framewrok's interface allows for defining an acrylic graph of dependencies. The graph's structure reflects the startup sequence of managed services. Upon services failure or international termination, the dependencies are consulted to determine which services may be affected. If the dependencies so dictate, a service that has gone off-line will automatically be restarted. The requisite changes, e.g., restarting, will be propagated along the graph's edge to ensure that the required dependencies are satisfied for each services. Wer demonstrate the usefulness of this framework thorugh real-life case studies. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.18 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.67 Enterprise modeling using data dependencies is common in monitoring and business performance management systems. The modern enterprise is a dynamic creature, constantly adapting itself to the changing environment. This adaptation may result in changes in enterprise components and data dependencies between them. An enterprise model must be able to express this dynamism, and business performance management services must be able to react accordingly. In this paper, we briefly introduce ADI (Active Dependency Integration Technology), a language for modeling data dependencies between entities. We discuss developments related to support in modeling dynamic environments, where elements may be added or deleted. Dynamism-related developments include the support of automatic dependency instantiation from an abstract dependency. The abstract dependency expresses a general pattern in the ontology, functioning as a template for dependency instances. Another aspect of dynamism is support for changes in existing dependencies rather than only creating new dependencies; for example, adding a new entity to a dependency. Changes in topology do not imply system redeployment. ADI also supports the influence of dynamism on data items and subsequent propagation of this influence through the model. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.67 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.105 In this paper we discuss a case study for the UK Police IT Organisation (PITO) on using a model-based approach to verifying web service composition interactions for a coordinated service-oriented architecture. The move towards implementing web service compositions by multiple interested parties as a form of distributed system architecture promotes the ability to support 1) early verification of service implementations against design specifications and 2) that compositions are built with compatible interfaces for differing scenarios in such a collaborative environment. The approach uses finite state machine representations of web service orchestrations and distributed process interactions. The described approach is supported by an integrated tool environment for for providing verification and validation results from checking designated properties of service models. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.105 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.22 This paper presents Abacus, a service-oriented programming language designed for the development of grid applications. Abacus considers that all the grid resources constitute a unified logical address space, where each memory cell holds a resource in the form of a service, and a grid application solves a problem by operating on these memory cells. Abacus allows programmers to concentrate on the logic of their applications, such as service implementation logic, service invocation logic, and glue logic. Low-level details such as resource distribution, resource binding, and service deployment are supported by the compiler and the runtime system. With such virtualization techniques, Abacus helps to enhance the productivity of programmers in developing grid applications. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.22 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.9 Considering the facts that existing benchmarks to measure the performance of Web service frameworks simulate only theoretical scenarios such as streaming homogeneous data structures and the computer industry has an established culture of developing performance benchmarks imitating real world scenarios, an effort was made to come up with a benchmark that closely represent the real world business services. The paper concludes that the benchmark represents an unbiased subset of actual scenarios because the ranking and performance patterns of the leading Web services frameworks used in the experiment are consistent with Industry wide experiences. Additionally the paper introduces a performance model to analyze Web service frameworks and identifies complexity of the SOAP messages and size of the payloads they carry as two major factors that affect the RTT of the SOAP messages and reveals that a framework that is good at handling complex SOAP messages may not deal with messages that carry larger payloads equally well. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.9 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.94 The Service Oriented Architecture (SOA) provides a methodology for designing software systems by integrating loosely coupled services. Compared to traditional distributed object-oriented architectures, SOA is more suitable to integrate heterogeneous systems, and more adaptable in a changing environment. This paper presents the design and implementation of a SOA framework for financial transaction applications. The framework provides an easy and uniform way for service composition in a controlled environment, and leverages Web service standards with efficient communication mechanisms and durable and/or transactional message queues. Speci?cally, the work addresses the following issues: 1) the incorporation of existing systems and protocols that are not Web-service compatible. This paper focuses on business processes of equities transactions using the FIX [6] protocol. 2) the congfiguration and deployment of services and service endpoints in a flexible and dynamic manner. 3) the capability of specifying business processes as Web service compositions and a distributed runtime environment that supports it. 4) the scalability, resiliency and transactional aspects as required in critical business applications. The experience of applying the framework in building a high performance equities transaction system is presented. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.94 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.17 An important aspect of service-centric systems (i.e. systems composed of services) is the ability to support service discovery at run-time in order to cope with unavailable or malfunctioning services. In this paper we present a framework that supports run-time service discovery. The central characteristics of this framework is the combination of components for monitoring the compliance of service-centric systems with requirements at run-time and components for discovering servies at run-time. The framework uses the former components to generate queries for discovering services that could subtitute for malfunctioning services. It also uses queries derived from the process specification for service discovery. These queries incorporate both structural and behavioral aspects fo the required services. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.17 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.100 Marketing of agricultural produce is a complex task involving various stack-holders, products and business scenarios. In a developing country like India, this activity is influenced by local, socio-economic and cultural characteristics. Evaluating the business processes at regional or national scale therefore, reveals diversity in products, terminology, and process to carry out a complete business activity. While other complex but well-defined business processes are experiencing benefits of services driven e-business; "marketing of agricultural produce' has remained untouched by this revolution. Government of India is now planning to implement agricultural marketing reforms to streamline the process in all markets throughout the nation. Yet unavailability of proper underlying IT infrastructure will continue to inhibit the implementation and penetration of such technological advancements amongst the users. In absence of such capability, the informal transactions provide meager benefits to a farmer who looses a better price in other potential market, or a wholesaler, who might have got the desired quality product at a lower cost directly from the farm. There is a need to develop affordable and reliable solution that links all the actors involved in the system and provide an environment for a competitive business. This research paper demonstrates Web Services based business process management system, developed to aid marketing of agricultural produce. For achieving relevance to real-life practice, we carefully follow the business process suggested in model act that is planned for implementation in all the Agricultural Produce Marketing Committees (APMC) throughout India. Our proposal exposes various business functionalities explained in the act, in the form of Web Services that can also utilize the existing IT infrastructure of the APMCs. With the help of above http://doi.ieeecomputersociety.org/10.1109/SCC.2005.100 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.113 This paper presents a service-oriented framework for the development of wrapper code generators, including the methodology of designing an effective wrapper program construction facility and a concrete implementation, called XWRAPComposer Three unique features distinguish XWRAPComposer from existing wrapper development approaches. First, XWRAPComposer is designed to enable multi-stage and multi-page data extraction. Second, XWRAPComposer is the only wrapper generation system that promotes the distinction of information extraction logic from query-answer control logic, allowing higher level of robustness against changes in the service provider's web site design or infrastructure. Third, XWRAPComposer provides a userfriendly plug-and-play interface, allowing seamless incorporation of external services and continuous changing service interfaces and data format. 1 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.113 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.107 Web service discovery is a key problem as the number of services is expected to increase dramatically. Service discovery at the present time is based primarily on keywords, or interfaces of web services through the use of ontology. We argue that "behavior signatures" as operational level description should play an important role in the service discovery process. In this paper, we propose a new behavior model for web services using automata and logic formalisms. Roughly, the model associates messages with activities and adopts the IOPR model in OWL-S to describe activities. A new query language is developed to express temporal and semantic properties on service behaviors. Query evaluation algorithms are developed; in particular, an optimization approach using RE-tree and heuristics is shown to improve the performance. Speci?cally, experimental results show that the use of RE-tree reduces query evaluation time by an order of magnitude and with heuristics it enhances the performance by two orders of magnitude. This is clearly an encouraging starting point. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.107 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.93 With the increasing growth in popularity of Web services, matchmaking of relevant Web services becomes a significant challenge. Commonly, Web service is described by WSDL and published on UDDI registers. UDDI provides limited search facilities allowing only a keyword-based search of businesses, services, and the so called tModels based on names and identifiers. This category-based keyword-browsing method is clearly insufficient. Semantic Web service uses DAML-S instead of WSDL to represent capabilities of Web services. This improvement enables software agents or search engines to automatically find appropriate Web services via ontologies and reasoning algorithm enriched methods. However, the high cost of formally defining to the heavy and complicated services makes this improvement widespread adoption unlikely. To cope with these limitations, we have developed a suite of methods which assesses the similarity of Web services to achieve matchmaking. In particular, we present a conceptual model which classifies properties of Web services into four categories. For each category, a similarity assessment method has been given. In Web service matchmaking process, these similarity assessment methods can be used together or individually. Experiments highlight complementary contributions that our work makes to facilitate web service matchmaking. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.93 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.12 This paper provides a generalized approach for building a QoS Based Registry for Service Oriented Architecture. This framework enhances the current Universal Description, Discovery and Integration (UDDI) standard in order to achieve better search efficiency and improved quality of search based on user specified QoS parameters. The proposed model does not require any changes or modification to the current UDDI standard but provides a middleware repository that is used to store a valid subset of the UDDI data with QoS specifications. The proposed framework is expandable to include additional quality of service parameters depending on the application. The implementation of this framework illustrates the effectiveness of our proposed QoS based registry. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.12 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.15 A significant challenge of successful application of the Service- Oriented Architecture (SOA) in large-scale distributed systems is the Quality of Service (QoS) management, which provides various QoS guarantee levels for concurrent clients through effective resource allocations and adaptations. In this paper, we propose a policy-based approach for specifying QoS management strategies and enforcing QoS guarantees. This approach enables easy adaptation of new business rules and adaptation to system resource changes. This approach is also effective for supporting QoS management, as demonstrated in our experiments in a Publish/ Subscribe system. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.15 http://doi.ieeecomputersociety.org/10.1109/SCC.2005.114 The paper employs three types of agents namely Resource Brokering Agents (RBAs), Job Agents (JAs), and Resource Monitoring Agents (RMAs) for resource allocation in grid computing. RBA acts as a resource scheduler as well as a broker for the users to submit their jobs through JAs. JAs search for the resources. RMAs reside inside the nodes of the local cluster and inform the status of the resources to the local cluster server. The proposed model is evaluated in a simulated environment to test its operational effectiveness in various scenarios. http://doi.ieeecomputersociety.org/10.1109/SCC.2005.114