• Title, Summary, Keyword: web services

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Clustering and Pattern Analysis for Building Semantic Ontologies in RESTful Web Services (RESTful 웹 서비스에서 시맨틱 온톨로지를 구축하기 위한 클러스터링 및 패턴 분석 기법)

  • Lee, Yong-Ju
    • Journal of Internet Computing and Services
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    • v.12 no.4
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    • pp.119-133
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    • 2011
  • With the advent of Web 2.0, the use of RESTful web services is expected to overtake that of the traditional SOAP-based web services. Recently, the growing number of RESTful web services available on the web raises the challenging issue of how to locate the desired web services. However, the existing keyword searching method is insufficient for the bad recall and the bad precision. In this paper, we propose a novel building semantic ontology method which employs both the clustering technique based on association rules and the semantic analysis technique based on patterns. From this method, we can generate ontologies automatically, reduce the burden of semantic annotations, and support more efficient web services search. We ran our experiments on the subset of 168 RESTful web services downloaded from the PregrammableWeb site. The experimental results show that our method achieves up to 35% improvement for recall performance, and up to 18% for precision performance compared to the existing keyword searching method.

Goal-oriented analysis for Web Services application Development (Web Services 어플리케이션 개발을 기한 Goal지향의 분석 방안)

  • 김은정;김진태;박수용
    • Proceedings of the Korean Information Science Society Conference
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    • pp.406-408
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    • 2002
  • 광범위하게 이용하고 있는 웹은 기존에 텍스트나 이미지만을 제공하던 정적인 정보에서 사용자 위주의 서비스 중심으로 변화하고 있다. 웹 환경의 변화는 Web Services를 등장 시켰고 산업계에서 이미 이를 위한 표준화 작업 및 표준에 따른 Web Services 개발을 주력하고 있다. 이에 Web Services를 이용한 어플리케이션 개발이 또 다른 소프트웨어 공학적 이슈로 대두되어 그를 위안 연구가 진행 중이다. 본 논문에서는 Web Services 어플리케이션 개발을 위한 목표 지향 분석 방안을 제시하고 결론과 시멘틱 웹 의 표현 기준의 하나인 DAML로 변환하는 알고리즘이 향후 연구되어야 할 과제임을 논한다

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A Study on Recommendation Methods in Web Services: Existing Solutions and Their Limitations

  • Nasridinov, Aziz;Byun, Jeong-Yong
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.606-607
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    • 2014
  • Due to Web Services' platform and language independent nature, many business corporations have used them for the integration of various applications. However, the growing amount of available Web Services on Web forms a new problem - how to select and recommend an appropriate Web Service that matches the user requirements. In this paper, we investigate recommendation methods in Web Services, and discuss their strength and limitations.

A Framework to Support Reconfiguration of Single Web Service Based on Dynamic QoS Properties (동적 QoS 속성을 고려한 단일 웹서비스의 교환을 지원하는 프레임워크)

  • Jin, Sang-Chan;Lee, Eun-Joo
    • Journal of the Korea Society of Computer and Information
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    • v.14 no.4
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    • pp.77-86
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    • 2009
  • At present, Web services become main means to construct web applications. As the number of web services grows and various kind of web services have been produced, QoS properties of web services are one of important criteria to select more appropriate web services. However, the selected web services may become inappropriate for the Requester's requirements, because QoS is kind of dynamic properties. this paper proposes a framework that proposed that finds an appropriate web service for Requester's QoS requirements, and dynamically replaces an inappropriate web service with right one. The problems which happen in substitution step are also identified and the solutions are described with an illustrative example.

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A Research on Managing Assurance Level for Guaranteeing Quality of Web Services (웹 서비스 품질보장을 위한 보증수준 유지방안 연구)

  • Lee, Young-Kon;Kim, Eun-Ju
    • The KIPS Transactions:PartD
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    • v.14D no.3
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    • pp.319-328
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    • 2007
  • As the coverage of Web services become wider and the number of implementation cases is growing, the importance of applying the Web services quality model to real world is increased. For maintaining the level of Web services qualify, it should be required to study on assurance method of Web services qualify level. Assurance for Web services, which is newly proposed by OASIS TC, means the totality of activities for managing the quality level of them. For managing Web service quality, Web service associates could usually use SLA(Service Level Agreement) method in which a service consumer contracts for some service level with a service provider and gives for penalty or pays incentives according to the result of evaluation of services. But, there are some difficulties in applying SLA to Web services, because Web services have publicity, multiple users, and 3rd party for management. So, we need a new assurance method for Web service by considering the characteristics of Web services. This paper provides the new concept of committed assurance level for Web services. This concept can be defined as the set of maximum level of quality expected by each user, which provide the consistent view of Web service quality. This paper presents the method for duality associates to preserve some quality level of Web service by using this concept.

An Autonomic -Interleaving Registry Overlay Network for Efficient Ubiquities Web Services Discovery Service

  • Ragab, Khaled
    • Journal of Information Processing Systems
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    • v.4 no.2
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    • pp.53-60
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    • 2008
  • The Web Services infrastructure is a distributed computing environment for service-sharing. Mechanisms for Web services Discovery proposed so far have assumed a centralized and peer-to-peer (P2P) registry. A discovery service with centralized architecture, such as UDDI, restricts the scalability of this environment, induces performance bottleneck and may result in single points of failure. A discovery service with P2P architecture enables a scalable and an efficient ubiquities web service discovery service that needs to be run in self-organized fashions. In this paper, we propose an autonomic -interleaving Registry Overlay Network (RgON) that enables web-services' providers/consumers to publish/discover services' advertisements, WSDL documents. The RgON, doubtless empowers consumers to discover web services associated with these advertisements within constant D logical hops over constant K physical hops with reasonable storage and bandwidth utilization as shown through simulation.

A Study on Security Evaluation for Mobile Web Services Message (모바일 웹서비스 메시지의 보안 평가에 관한 연구)

  • Lee, Seoung-Hyeon;Lee, Jae-Seung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.765-768
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    • 2007
  • In this paper, the security evaluation method about mobile web services message is suggested in the method for improving the safety an reliability about the mobile web services message. In order that the goal of this paper is accomplished, the security threat and the security vulnerability which can be occurred in the mobile web services message are defined. The evaluation method for performing the security evaluation about the mobile web services message is defined. Also, the requirements for the mobile web services message security evaluation are defined. Finally, the evaluation framework for performing the mobile web services message security evaluation is constituted, and the evaluation scenario example is suggested. By using the mobile web services message security evaluation defined in the paper, before the mobile web services is deployed, the security threats and security vulnerability can be verified. Also, the countermeasure for the security threat and security vulnerability discovered in the verification result can be prepared. Therefore, the sorority and reliability about the mobile web services can be improved.

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A Study on Applying Library 2.0 Using Service-Oriented Architecture and Web Services (SOA 기반 웹서비스의 Library 2.0 적용방안에 관한 연구)

  • Gu, Jung-Eok;Lee, Eung-Bong
    • Journal of Korean Library and Information Science Society
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    • v.38 no.3
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    • pp.297-320
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    • 2007
  • This study examined the main concepts of SOA and Web Services, and conducted technical analysis of major Web Services protocols such as SOAP, REST, SRW/U, and OAI-PMH that realize SOA, and suggested examples of SOAP and REST based Web Services establishments in foreign and domestic libraries respectively. In addition, it introduced application examples of Library 2.0 using Web 2.0 technology in foreign and domestic libraries and suggested how to apply SOA based Web Services protocol in Library 2.0. Finally, it proposed how to put Library 2.0 into practice applying meta-searching system integrating library OPAC, online bookstores, web portal sites and library union catalogs using REST based Open API.

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A Hybrid Service Orchestration Framework based on BPEL4WS

  • Kim, Sung-Min
    • Journal of information and communication convergence engineering
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    • v.7 no.3
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    • pp.253-257
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    • 2009
  • As the value of B2B integration gets more importance and the business process becomes more complex, BPEL4WS standard has been focused for the solution of the problems which is based on web service technology. Many vendors implement the standard in their systems to integrate B2B and web service based inner-Enterprise Application(EA)s. But there is no way to use the standard to integrate non-web service based EAs, because the standard is designed only for Service Oriented Architecture (SOA) over web services. This paper proposes Hybrid Service Orchestration Framework to participate web services and also non-web service based EAs in the business process as a partner using BPEL4WS standard. The framework introduces Hybrid Service Architecture to represent non-web service based EAs as a service, so BPEL4WS could be used to integrate web services and non-web service based EAs. And the framework also introduces Hybrid Service Toolkit to support software level facilities. The paper also introduces Hybrid Orchestration System that is based on Hybrid Service Orchestration Framework.

Automated Generation of Composite Web Services based on Functional Semantics (기능적 의미에 기반한 복합 웹 서비스 자동 구성)

  • Shin, Dong-Hoon;Lee, Kyong-Ho
    • Journal of Korea Multimedia Society
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    • v.11 no.9
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    • pp.1310-1323
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    • 2008
  • Recently, many studies on automated generation of composite Web services have been done. Most of these works compose Web services by chaining their inputs and outputs, but do not consider the functional semantics. Therefore, they may construct unsatisfied composite services against users' intention. Futhermore, they have high time-complexity since every possible combinations of available services should be considered. To resolve these problems, this paper proposes a sophisticated composition method that explicitly specifies and uses the functional semantics of Web services. Specifically, A graph model is constructed to represent the functional semantics of Web services as well as the dependency among inputs and outputs. On the graph, we search core services which provide the requested function ality and additional services which transform between I/O types of the user request and the core services. Then, composite services are built from combinations of the discovered services. The proposed method improves the semantic correctness of composite services by the functional semantics of Web services, and reduces the time complexity by combinations of functionally related services.

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