基于SOA的数字图书馆互操作开放框架

论文从图书馆目前面临的挑战开始,提出数字图书馆(DigitalLibraries,简称DLs)互操作的必要性,然后分析实现互操作的要点及其面临的难题。文章简要介绍了面向服务体系结构(Service-OrientedArchitecture,简称SOA)的概念和特点,详细阐述了基于SOA的DLs互操作开放框架,并用XML和WebServices实现了主要组件。     

网格环境下基于OAI的数字图书馆互操作机制

现有数字图书馆（DLs）互操作方案,在实现大规模数字图书馆集成方面都存在一定的局限性。该文将网格技术与OAI-PMH框架相结合,提出了一个数字图书馆网格（DL Grid）互操作框架,并对网格环境下元数据资源的发现、采集、重组等关键问题进行了分析和设计,初步实现了在集成的元数据基础上数字图书馆信息的共享。     

数字图书馆网格互操作框架

随着全球数字图书馆(DLs)的迅猛发展,互操作成为亟待解决的重要问题。目前DLs互操作的主要解决方案包括:分布式搜索、元数据收集、中间件技术等,在实现大规模的数字图书馆互操作方面都存在一定的局限性。文章通过对已有方案的分析和对比,指出各自的优势和不足,并在OAI-PMH框架的基础上,结合先进的网格技术,提出全新的数字图书馆互操作框架—数字图书馆网格DLGrid,为解决大规模数字图书馆的互操作提供一种新途径。     

DLs互操作开放框架

如何将分布的、异构的DLs联合起来向用户提供个性化服务,即实现DLs之间的互操作,成为DLs研究与开发所关注的中心问题。     

基于网格的数字图书馆互操作技术研究

以支持大规模资源共享和协作为核心的网格技术在解决数字图书馆（DLs）互操作问题，尤其是在异构平台兼容、集成已有系统方面有着独特的优势。本文对目前数字图书馆互操作主要解决方案进行分析和对比，包括：分布式搜索（Distributed Search）、元数据收集（Metadata Harvesting）、中间（Middleware）技术，指出各自的优势和不足，提出一种新的数字图书馆互操作框架——数字图书馆网格DL Grid，探讨利用先进的网格技术解决各数字图书馆的互操作性问题。     

网格环境下空间数据共享与互操作技术研究

空间数据共享与互操作是空间信息网格的关键技术之一.分析了网格环境下中空间数据共享与互操作涉及的角色与关键环节,提出了空间数据共享与互操作框架,探讨了基于GML/SOAP的空间数据互操作表达技术,通过扩展OGSA-DAI实现了对分布、异构的空间数据的访问与集成,并开发了一个原型系统,验证了基于GML/SOAP/扩展的OGSA-DAI的空间数据共享与互操作技术的可行性.     

基于MPEG-7本体的多媒体信息互操作研究

传统本体技术不能很好地解决多媒体信息系统的互操作问题。为实现多硬件平台下分布式、异构多媒体信息的互操作,采用MPEG-7本体描述多媒体信息。并在此基础上提出了基于MPEG-7本体的多媒体信息互操作框架,该框架采用MPEG-7本体,领域本体与应用本体等三个层次来描述对象。给出了框架的分层描述及具体功能。该框架已在高性能宽带信息网应用示范E-Show数字博览平台系统设计中采用,并取得了良好的应用效果。     

基于CORBA的多机器人应用互操作系统的研究与实现

本文针对异构分布环境下的多机器人系统,提出了一种基于CORBA规范和框架 请求代理（FRB）这一方式的应用系统集成模型．为实现分布异构环境下的多机器人的通信 、协同、编程,支持系统任务重组与重构、应用互操作提供一条有效途径．并给出了一个自 行设计的面向多机器人基于CORBA的对象互操作的方法、机制．给出基于CORBA的应用编程接 口（API）与扩展接口定义语言X IDL,通过基于CORBA的多机器人基本对象类的建立与对象 的实现,实现基于CORBA的多机器人互操作与开放分布处理原型系统．     

基于OAI的数字图书馆中元数据互操作框架

提出一种基于最新的元数据互操作协议———OAI的元数据互操作框架。文章给出了框架中各个组件的模块及功能说明,并说明各模块之间的交互。这种框架克服了以前人们所提出的其他集成方法过于复杂、难于实施的缺点。     

EMIF框架中区域集成服务器的设计

介绍了一种实现教育信息共享与互操作的模型--教育管理信息系统互操作框架(EMIF)的基本概念,讨论了EMIF的框架及数据交换模型,系统分析了EMIF框架中的核心部件--区域集成服务器(ZIS)的功能需求,给出了其功能模型.对于ZIS中关键功能--报文处理,给出了基于消息服务、传榆、管理的实现机制及其算法流程,并给出了一种提供报文的处理流程实例.最后,简单地讨论了一个基于EMIF的校园网多系统实现区域互操作的体系结构.     

Towards a digital library theory: a formal digital library ontology

Digital libraries (DLs) have eluded definitional consensus and lack agreement on common theories and frameworks. This makes comparison of DLs extremely difficult, promotes ad-hoc development, and impedes interoperability. In this paper we propose a formal ontology for DLs that defines the fundamental concepts, relationships, and axiomatic rules that govern the DL domain, therefore providing a frame of reference for the discussion of essential concepts of DL design and construction. The ontology is an axiomatic, formal treatment of DLs, which distinguishes it from other approaches that informally define a number of architectural variants. The process of construction of the ontology was guided by 5S, a formal framework for digital libraries. To test its expressibility we have used the ontology to create a taxonomy of DL services and to reason about issues of reusability, extensibility, and composability. Some practical applications of the ontology are also described including: the definition of a digital library services taxonomy, the proposal of a modeling language for digital libraries, and the specification of quality metrics to evaluate digital libraries. We also demonstrate how to use the ontology to formally describe DL architectures and to prove some properties about them, thus helping to further validate the ontology.     

A Web services-based framework for building componentized digital libraries

We present a new Web services-based framework for building componentized digital libraries (DLs). We particularly demonstrate how traditional RDBMS technology can be easily deployed to support several common digital library services. Configuration and customization of the framework to build specialized systems is supported by a wizard-like tool which is based on a generic metamodel for DLs. Such a tool implements a workflow process that segments the DL design tasks into well-defined steps and drives the designer along these steps. Both the framework and the configuration tool are evaluated in terms of several performance and usability criteria. Our experimental evaluation demonstrates the feasibility and superior performance of our framework, as well as the effectiveness of the wizard tool for setting up DLs.     

基于网格技术的数字图书馆互操作研究

互操作是实现数字图书馆集成或联邦的中心问题。对目前流行的几种数字图书馆互操作解决方案进行分析和对比,指出各自的优势和不足。在此基础上引入网格技术,提出一种基于网格技术的增强型互操作体系结构。对该体系结构进行具体分析。     

Better interoperability through the Open Archives Initiative

The Open Archives Initiative (OAI) is an evolving protocol and philosophy regarding interoperability for digital libraries (DLs). Previously, ‘distributed searching’ models were popular for DL interoperability. However, experience has shown distributed searching systems across large numbers of DLs to be difficult to maintain in an Internet environment. The OAI is a move away from distributed searching, focusing on the arguably simpler model of ‘metadata harvesting’. Perhaps the strongest and distinguishing feature of OAI is its simplicity: by being ‘smaller’ than previous interoperability projects, it actually allows for more powerful and adaptable configurations and deployments. Key concepts in OAI include the separation of responsibilities of ‘service provider’ and ‘data provider’ and the use of community‐specific metadata sets (with Dublin Core as a lingua franca). This paper gives a brief history of the OAI, an examination of the protocol itself, and lists some of the current projects and future directions.     

Integration of complex archeology digital libraries: An ETANA-DL experience

In this paper, we formalize the digital library (DL) integration problem and propose an overall approach based on the 5S (streams, structures, spaces, scenarios, and societies) framework. We then apply that framework to integrate domain-specific (archeological) DLs, illustrating our solutions for key problems in DL integration. An integrated Archeological DL, ETANA-DL, is used as a case study to justify and evaluate our DL integration approach. More specifically, we develop a minimal metamodel for archeological DLs within the 5S theory. We implement the 5SSuite tool set to cover the process of union DL generation, including requirements gathering, conceptual modeling, rapid prototyping, and code generation. 5SSuite consists of 5SGraph, 5SGen, and SchemaMapper, each of which plays an important role in DL integration. We also propose an approach to integrated DLs based on the 5S formalism, which provides a systematic method to design and implement DL exploring services.     

Interoperability test suite derivation for communication protocols

This paper addresses the problem of interoperability testing for communication protocols. We develop a coherent framework of interoperability testing in which the notions of interoperability, interoperability testing, interoperability test case and interoperability test architecture are interrelated and a systematic interoperability test suite derivation method based on the framework. The approach to interoperability testing is illustrated with the example of the ATM Signaling Protocol. To demonstrate practicality of the approach, we implemented executable test suites derived by the method on a commercial ATM test platform, applied them for interoperability testing of various ATM equipment and analyzed the testing results.