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1.
关联数据及其应用现状综述   总被引:12,自引:0,他引:12  
自主、异类、异构和分布的海量数据间的语义关联一直是知识组织和知识发现的核心问题,关联数据(Linked Data)技术的出现为此提供一种轻型、渐增化、可伸缩和可扩展的动态机制。基于对大量文献的梳理和分析,描述Linked Data的原则与技术体系,介绍Linked Data发布、Link浏览器、Linked Data搜索引擎、Link更新维护等核心技术,简要介绍若干典型应用,提出在具体领域实施Linked Data应用的关键挑战。  相似文献
2.
本文结合中国科学引文数据库和中国生态系统研究网络通量数据的关联数据发布,以关联数据的发布技术框架为研究对象,采取实例阐释的方法,提出了关联数据发布过程中可参考的标准化流程,并详细分析了其中的关键问题.研究表明,关联数据发布流程可以分解成数据建模、实体命名、实体RDF化、实体关联化、实体发布、开放查询六个关键步骤,发布过程中需要考虑到多语种问题、值词表的发布、RDF词表的发布等关键问题.关于利用D2R Server发布数据,本文建议:不要采用空白节点;尽量做好关系型数据库的前期设计;指定非文本属性的数据类型;适当进行实体表的拆分与合并.  相似文献
3.
In developing open data policies, governments aim to stimulate and guide the publication of government data and to gain advantages from its use. Currently there is a multiplicity of open data policies at various levels of government, whereas very little systematic and structured research has been done on the issues that are covered by open data policies, their intent and actual impact. Furthermore, no suitable framework for comparing open data policies is available, as open data is a recent phenomenon and is thus in an early stage of development. In order to help bring about a better understanding of the common and differentiating elements in the policies and to identify the factors affecting the variation in policies, this paper develops a framework for comparing open data policies. The framework includes the factors of environment and context, policy content, performance indicators and public values. Using this framework, seven Dutch governmental policies at different government levels are compared. The comparison shows both similarities and differences among open data policies, providing opportunities to learn from each other's policies. The findings suggest that current policies are rather inward looking, open data policies can be improved by collaborating with other organizations, focusing on the impact of the policy, stimulating the use of open data and looking at the need to create a culture in which publicizing data is incorporated in daily working processes. The findings could contribute to the development of new open data policies and the improvement of existing open data policies.  相似文献
4.
RDA与关联数据   总被引:1,自引:0,他引:1       下载免费PDF全文
作为新一代编目规则,RDA在应用模型、书目记录的结构、术语和编目规则等方面与其前一个版本AACR2相比,有很大变化。RDA首先区分书目对象相关实体,再确定各类实体所需描述的属性,以及各类实体、属性、取值等要素之间的关系,并对各类规范取值词表进行规定。这种基于概念模型的描述特别适合利用语义网技术来实现。关联数据是语义网的一个简化方案,以RDA编目的书目数据用关联数据发布,能使RDA的潜力发挥到极致。不久的将来,具有语义的书目数据在互联网上将不断增多,书目数据的普遍关联将指日可待。  相似文献
5.
家谱关联数据服务平台的开发实践   总被引:1,自引:1,他引:0  
数字图书馆对馆藏的揭示,沿袭传统的描述标准(如MARC),多以文献特征为主,很难直接满足广大读者对文献知识内容进行查询的需求。关联数据技术通过构建关系明确的语义本体,能够很好地提供基于文献知识内容的揭示、导航和检索,通过开放数据重用和与外部数据的互联,丰富了数据的关联性,扩展了数据利用场景,释放了数据的潜能,为基于互联网的数据服务提供了一种基础设施。这是未来数字图书馆进行知识服务的应有之义。上海图书馆以家谱数据作为起点,尝试利用关联开放数据技术重组图书馆传统资源,构建历史文献数据服务平台。该平台经过基于BIBFRAME的本体设计,从RDB到RDF的数据转换,基于关联数据四原则的系统设计和基于语义技术框架的系统开发,支持面向万维网的书目控制,提供针对普通用户的寻根搜索服务和针对专业人士的数据挖掘服务。图5。参考文献11。  相似文献
6.
This paper presents a benchmark proposal for the Open Government and its application from the open data perspective using data available on the U.S. government's open data portal (data.gov). The benchmark is developed over the adopted Open Government conceptual model, which describes Open Government through data openness, transparency, participation and collaboration. Resulting in two measures, that is, one known as the e-government openness index (eGovOI) and the other Maturity, the benchmark indicates the progress of government over time, the efficiency of recognizing and implementing new concepts and the willingness of the government to recognize and embrace innovative ideas.  相似文献
7.
This article presents a case study of the open data project in the Chicago area. The main purpose of the research is to explore empowering potential of an open data phenomenon at the local level as a platform useful for promotion of civic engagement projects and provide a framework for future research and hypothesis testing. Today the main challenge in realization of any e-government projects is a traditional top–down administrative mechanism of their realization itself practically without any input from members of the civil society. In this respect, the author of the article argues that the open data concept realized at the local level may provide a real platform for promotion of proactive civic engagement. By harnessing collective wisdom of the local communities, their knowledge and visions of the local challenges, governments could react and meet citizens' needs in a more productive and cost-efficient manner. Open data-driven projects that focused on visualization of environmental issues, mapping of utility management, evaluating of political lobbying, social benefits, closing digital divide, etc. are only some examples of such perspectives. These projects are perhaps harbingers of a new political reality where interactions among citizens at the local level will play a more important role than communication between civil society and government due to the empowering potential of the open data concept.  相似文献
8.
The purpose of this article is to examine how aid agencies are strategically leveraging open data to improve the effectiveness of aid. Recognizing the vital role of information in international development, aid agencies have eagerly begun to adopt the tools of Open Government within the context of development (i.e. “Open Development”). Examining this trend, the author finds much scope for open data to support the development community's commitment to improving the effectiveness of aid by adopting a more systematic, coherent, and strategic approach to aid delivery (known as the “aid effectiveness” agenda). An investigation of the current state of the art finds that open data has made significant contributions towards realizing this more integrated vision of aid delivery, but that much of open data's potential remains unexplored. In particular, the use of open data is still largely focused on supporting after-the-fact reporting functions, overlooking its potential to enable integrated strategic planning and improved coordination across the full spectrum of development actors.  相似文献
9.
受到近年来诸多因素的交叉影响和积极推动,“数据权”已经成为信息权利的重要内容之一,公众对行业 开放数据抱有极大热情和期望。认为开放数据能提高政府公信力、科学竞争力及社会生产力,开放数据的主体具有多 样性的特征,并且存在着较为复杂的权利义务关系,开放数据需要在一系列原则、标准和技术的支持下有序、稳步开 展,并需要全球化的资源整合与业务协作。  相似文献
10.
文章介绍了都柏林元数据2013年年会的基本情况,即会议议程和会议内容,并在此基础上,就会议的部分主题,如e.Science、CAMP-4-Data主题研讨以7LDCMI年会首次举行的最佳论文和最佳年度报告作重点介绍。在文章最后对DCMI当前的工作主题及其进展也做了一个小结。  相似文献
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