• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.424-426
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• 2004

웹서비스란 XML 포맷의 벤더 중립적인 표준을 따라 웹에 산재한 웹 애플리케이션들을 통합하는 새로운 분산 컴퓨팅 기술이다. 웹서비스를 이용해서 비즈니스 로직을 바탕으로 유용한 서비스를 제공하는 새로운 비즈니스 프로세스를 구현하기 위해서 기존의 웹서비스를 조합하여 비즈니스 프로세스를 기술하는 웹서비스 컴포지션 스펙이 제안되었다. IBM과 Microsoft에서는 BPEL4WS, Sun에서는 WSCI, BPMI.org에서는 BPML을 제안하였는데, 그 중에 BPEL4WS와 BPML은 기업 내부 시스템에서 사용되는 실행 가능한 비즈니스 프로세스를 기술한다. 본 논문에서는 실행 가능한 비즈니스 프로세스를 위한 이 두 스펙간의 상호 운영성을 증대하기 위해서 BPEL4WS와 BPML간의 상호 변환 알고리즘을 제안한다. 예를 들어 BPEL4WS 구현 시스템에서 BPEL4WS에서 BPEL4WS로의 변환 알고리즘을 이용하여 BPEL4WS 뿐만 아니라 BPML로 기술된 비즈니스 프로세스를 참조할 수 있고, BPEL4WS에서 BPML로 변환 알고리즘을 이용하여 BPEL4WS 구현 시스템에서 사용 중인 비즈니스 프로세스 인스턴스를 BPML 프로세스로 출력하여 BPML 구현 시스템에서 사용할 수 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.484-486
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• 2004

현재 웹 서비스의 결합을 기술하기 위한 다양한 방법들이 제시되고 있지만 XLANG과 WSFL의 장점을 수용한 BPEL4WS로 통합되고 있는 추세이다. BPEL4WS는 비즈니스 프로세스에 참여하는 웹서비스들간의 상호동작과 프로세스의 상태 정보를 기술할 수 있는 효과적인 방법을 제공한다. 그러나, BPEL4WS로 기술된 명세를 웹서비스화 하기 위한 실행 방안에 대한 연구는 미흡한 실정이다. 이에 본 논문은 비즈니스 프로세스에 내재된 워크플로우 그래프로부터 간략화 된 실행 그래프의 생성 방법을 제안한다. 또한 실행 그래프를 이용하여 BPEL4WS 명세의 병렬 및 분산 실행을 지원하는 구현 방안에 대해 논의한다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.22-24
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• 2004

웹 서비스는 SOAP, WSDL, UDDI와 같은 표준을 기반으로 인터넷상의 분산된 여러 서비스들을 통합하는 가장 효과적인 방법으로 알려져 있다. 이러한 통합을 위하여 웹 서비스 표준 프로세스 통합모델 언어인 BPEL4WS가 제시되었다. 이와 같은 분산된 서비스 통합 시에 서비스 신뢰성 확보를 위해서는 통합 환경 상의 품질 관리가 필요하나 확실한 대안 책이 없었다. 이에 본 논문에서는 사용자와 공급자 사이의 협정을 통해 품질 보증하는 SLA를 이용하여, BPEL4WS로 통합한 환경에 적합한 품질 보증기법을 제시한다. 또한 제시한 기법의 효율적인 활용을 위한 웹 서비스 통합 프레임워크를 제시한다.

• 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.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.714-717
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• 2004

In this paper, we describe issues related to standardized interaction among companies that are in the environments of heterogeneous information systems. The interaction method is detailed based on BPEL4WS, which is XML based standard specification. This paper provides method of interoperability using web service, which is considered a new information system paradigm. The method has importance in that it enables to exchange data in a platform independent manner. This paper deals with a method of interaction among heterogeneous information system based on BPEL4WS standard. The concepts of interoperability, XML, and workflow are introduced. The standards and previous research results related to interoperability are also provided. It describes brief introduction of BPEL4WS specification and its technical details. Integrated business process using BPEL4WS and interoperability issues are also included..

• Journal of Internet Computing and Services
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• v.6 no.2
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• pp.1-11
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• 2005

Web services are being recognized as the efficient way to integrate the distributed applications on the web based on the web standards such as SOAP, WSDL and UDDI. Recently, BPEL4WS is suggested as a standard integration model language for web services to integrate them efficiently. The recent studies of web service integration are focused on the comparability among the services, process identification and tracing, and automation, However, little or no effort has been dedicated to the reusability, extensibility on the business process integrated services and how to allocate the services dynamically, So, in this paper, we propose how to increase the reusability and extensibility of integrated structure when services are integrated using BPEL4WS, and how to allocate and use the services dynamically. Also, we propose the framework of the composition of web services for the efficient use of suggested integrated structure.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.235-242
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• 2006

본 논문에서는 웹서비스를 위한 비즈니스 프로세스 실행 언어인 BPEL4WS 표준을 구현하기 위한 표준 도입 가이드라인을 개발하여 제시하였다. BPEL4WS 표준을 지원하는 BPM 솔루션이 갖추어야 하는 참조 아키텍처(Reference Architecture)를 제시하고, 참조 아키텍처를 구성하는 핵심 컴포넌트인 BPEL 디자이너, 프로세스 공개 모듈 및 시작 모듈, BPEL 엔진 프로세스 모니터링 및 분석 모듈별로 구현 가이드라인을 제시하였다. 본 연구에서 제시한 가이드라인은 BPM 시스템 개발 기업이 BPEL 표준을 적용하여 솔루션을 효율적으로 구축하는데 활용될 수 있다.

• Proceedings of the CALSEC Conference
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• 2003.09a
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• pp.236-241
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• 2003

Business collaboration can be achieved by message exchange between companies. Such an exchange method enables loosely coupled integration between heterogeneous organization, and Web service has been a popular technique for accomplishing it. This research focuses on the choreography standards extending Web Service, specifically WSCI, BPEL4WS, and BPML. We compare and analyze the standards in terms of functionality, expressiveness and so on.

• The KIPS Transactions:PartD
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• v.15D no.4
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• pp.569-580
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• 2008

Web services are the current most promising technology for service oriented architecture(SOA) implementations. However, in spite of the large scale acceptance of web services, they have been relegated to internal integration projects, and the grand vision of virtual enterprises where partners can be integrated on demand is yet to be realized. The main reason is that the current standards of web services are not very suitable for the dynamic web service discovery and integration. In this paper, we present a novel SemanticBPEL solution that merges the benefit of WS-BPEL, with the advantage of OWL-S for building a semi-automatic web service composition system. In particular, this work proposes a multi-phase search method for solving dynamic discovery and integration problems of web services. The proposed method is compared with the existing keyword based retrieval method. These comparisons show that our approach outperforms the existing method.

• The KIPS Transactions:PartD
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• v.14D no.2
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• pp.265-272
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• 2007

In this paper, we implement an automated composition system of web services using hybrid techniques that merge the benefit of BPEL techniques, with the advantage of OWL-S, BPEL techniques have practical capabilities that fulfil the needs of the business environment such as fault handling and transaction management. However, the main shortcoming of these techniques is the static composition approach, where the service selection and flow management are done a priori and manually. In contrast, OWL-S techniques use ontologies to provide a mechanism to describe the web services functionality in machine-understandable form, making it possible to discover, and integrate web services automatically. This allows for the dynamic integration of compatible web services, possibly discovered at run time, into the composition schema. However, the development of these approaches is still in its infancy and has been largely detached from the BPEL composition effort. In this work, we describe the design of the SemanticBPEL architecture that is a hybrid system of BPEL4WS and OWL-S, and propose algorithms for web service search and integration. In particular, the SemanticBPEL has been implemented based on the open source tools. The proposed system is compared with existing BPEL systems by functional analysis. These comparisions show that our system outperforms existing systems.