Nowadays, Web services (WS) remain a main actor in the implementation of distributed applications. They represent a new promising paradigm for the development, deployment and integration of Internet applications. The aim of Web services composition is to use the skills of several departments to resolve any problem that cannot be solved individually. The result of this composition is a compound of Web services that define how they will be used. In this paper, we propose an approach for automatic web services composition based on the concepts of directed graphs for the representation and description of Web services, and the ordering of web services compound execution. In this context, the user query, defined by a set of inputs and outputs, can be viewed as a directed graph composed of Web services.
Openoffice.org是一个流行的、免费的开源办公产品。该产品被数百万人使用，并由全球数千名开发人员开发，维护和扩展。Web服务技术在Web中发挥着主导作用，每天为数百万人提供服务。Axis2是最流行、免费和开源的Web服务引擎之一。本文提出的Axis2UNO框架，将这两种技术结合起来，能够开创办公环境的新时代。另外两个增强办公产品中Web服务功能的尝试是Excel Web Services和UNO Web Service Proxy。Excel Web Services与Microsoft SharePoint技术相结合，并在专有的Microsoft Office产品中以不同的角度公开信息共享。UNO Web Service Proxy是用Java Web Services Developer Pack实现的，并在Openoffice.org中启用基本的Web服务相关功能。然而，这里介绍的工作是第一个结合Openoffice.org和Axis2的工作，我们希望它在社区参与和这些产品的功能丰富性方面胜过其他工作。
QoS identification for untrustworthy Web services is critical in QoS management in the service computing since the performance of untrustworthy Web services may result in QoS downgrade. The key issue is to intelligently learn the characteristics of trustworthy Web services from different QoS levels, then to identify the untrustworthy ones according to the characteristics of QoS metrics. As one of the intelligent identification approaches, deep neural network has emerged as a powerful technique in recent years. In this paper, we propose a novel two-phase neural network model to identify the unt…
The Mobile intermittent wireless connectivity limits the evolution of the mobile landscape, such that this progress coupled with the ubiquitous nature of the Internet and the web services. The web service Reliability achieves the low overhead communication and retrieves the appropriate state response from the web service consumption. This paper discusses and analyzes the most recent approaches that achieve the reliability of web services consumed by mobile devices. Achieving the reliable web service consumption istended to two approaches: Middleware approach and Mobile Agent(MA) approach. Both…
The composition of web services is a promising approach enabling flexible and loose integration of business applications. Numerous approaches related to web services composition have been developed usually following three main phases: the service discovery is based on the semantic description of advertised services, i.e. the functionality of the service, meanwhile the service selection is based on non- functional quality dimensions of service, and finally the service composition aims to support an underlying process. Most of those approaches explore techniques of static or dynamic design for a…
The intermittent wireless connectivity in Mobiles limits the spread of mobile applications usage over the web, such that the web services are the independent protocol that used to achieve the mobile connectivity with the cloud services. Achieving the web service reliability results in two aspects. The first is low communication overhead and retrieving the appropriate response to prevent the duplicate request execution. The second is overcoming the request time out problem that is one of the most effected issues in the mobile experience. This paper proposes Reliable Mobile Agent and Web Socket …
Since the birth of web service composition, minimizing the number of web services of the resulting composition while satisfying the user request has been a significant perspective of research. With the increase of the number of services released across the Internet, seeking efficient algorithms for this research is an urgent need. In this paper we present an efficient mechanism to solve the problem of web service composition. For the given request, a service dependency graph is firstly generated with the relevant services picked from an external repository. Then, each search step on the graph …
We refine the relation of Web service orchestration, abstract process, Web service, and Web service choreography in Web service composition, under the situation of cross-organizational corporation. We also introduce the formal verification process of this relation through an example.
The given paper presents an overview of modern RESTful API description languages (belongs to interface description languages set) - OpenAPI, RAML, WADL, Slate - designed to provide a structured description of a RESTful web APIs (that is useful both to a human and for automated machine processing), with related RESTful web API modeling frameworks. We propose an example of the schema model of web API of the service for pre-trained distributional semantic models (word embeddings) processing. This service is a part of the Personal Research Information System services ecosystem - the Research and D…
Automated service composition as the process of creating new software in an automated fashion has been studied in many different ways over the last decade. However, the impact of automated service composition has been rather small as its utility in real-world applications has not been demonstrated so far. This paper presents \tool, an algorithm for automated service composition applied to the area of machine learning. Empirically, we show that \tool is competitive and sometimes beats algorithms that solve the same task but not benefit of the advantages of a service model. Thereby, we present a…
Web services are important in the processing of personal data in the World Wide Web. In light of recent data protection regulations, this processing raises a question about consent or other basis of legal processing. While a consent must be informed, many web services fail to provide enough information for users to make informed decisions. Privacy policies and privacy languages are one way for addressing this problem; the former document how personal data is processed, while the latter describe this processing formally. In this paper, the socalled Layered Privacy Language (LPL) is coupled with…
The evolution of the mobile landscape is coupled with the ubiquitous nature of the Internet with its intermittent wireless connectivity and the web services. Achieving the web service reliability results in low communication overhead and retrieving the appropriate response. The Middleware Approach (MA) is highly tended to achieve the web service reliability. This paper proposes a Reliable Service Architecture using Middleware (RSAM) that achieves the reliable web services consumption. The enhanced architecture focuses on ensuring and tracking the request execution under the communication limit…
Efficient service composition in real time while providing necessary Quality of Service (QoS) guarantees has been a challenging research problem with ever growing complexity. Several heuristic based approaches with diverse proposals for taming the scale and complexity of web service composition, have been proposed in literature. In this paper, we present a new approach for efficient service composition based on abstraction refinement. Instead of considering individual services during composition, we propose several abstractions to form service groups and the composition is done on these abstra…
Web service composition has been one of the most researched topics of the past decade. Novel methods of web service composition are being proposed in the literature include Semantics-based composition, WSDLbased composition. Although these methods provide promising results for composition, search and discovery of web service based on QoS parameter of network and semantics or ontology associated with WSDL, they do not address composition based on usage of web service. Web Service usage logs capture time series data of web service invocation by business objects, which innately captures patterns …
A Hybrid Approach to Web Service Recommendation Based on QoS-Aware Rating and Ranking
随着互联网上具有相同或相似功能的Web服务数量的不断增加，越来越多的服务使用者在寻找和选择合适的Web服务时，将注意力集中在Web服务的非功能属性上，即服务的服务质量（quality of service，QoS）。对于大多数QoS感知的Web服务推荐系统，推荐的Web服务列表通常是基于一个面向评级的预测方法，旨在预测潜在的评级，活跃的用户可能会分配给未评级的服务尽可能准确地获得。然而，在一些应用场景中，评级预测的高准确性可能不一定导致令人满意的推荐结果。在本文中，我们提出了一个面向排名的混合方法相结合的基于项目的协同过滤和潜在因素模型来解决Web服务的排名问题。特别是，两个Web服务之间的相似性来衡量他们的排名，而不是传统的QoS评级之间的相关系数。此外，我们还改进了衡量标准NDCG（归一化折扣累积增益），用于评估排名顺序返回的前K个建议的准确性。在真实Web服务的QoS数据集上进行了全面的实验，实验结果表明，该方法的性能优于其他同类方法。
Department of Computer Science and Software Engineering（计算机科学与软件工程系）；Concordia University（康考迪亚大学）；Montreal, Canada（加拿大蒙特利尔（注：这里实际是城市和国家，非机构，应忽略））
In the recent rapid growth of web services, IoT, and cloud computing, many web services and APIs appeared on the web. With the failure of global UDDI registries, different service repositories started to appear, trying to list and categorize various types of web services for client applications' discover and use. In order to increase the effectiveness and speed up the task of finding compatible Web Services in the brokerage when performing service composition or suggesting Web Services to the requests, high-level functionality of the service needs to be determined. Due to the lack of structure…
University of Trier（特里尔大学）；German Research Center for Artificial Intelligence (DFKI)（德国人工智能研究中心（DFKI））
The transition to Industry 4.0 requires smart manufacturing systems that are easily configurable and provide a high level of flexibility during manufacturing in order to achieve mass customization or to support cloud manufacturing. To realize this, Cyber-Physical Systems (CPSs) combined with Artificial Intelligence (AI) methods find their way into manufacturing shop floors. For using AI methods in the context of Industry 4.0, semantic web services are indispensable to provide a reasonable abstraction of the underlying manufacturing capabilities. In this paper, we present semantic web services …
