语义网

语义网WWW使得人们获取信息和指定服务的主要源泉发生了重要转变。然而,当前Web网仅仅是面向人的。目前,大部分Web网是一种人机系统。如果要从Web网得到什么,必须输入一个统一资源定位器(URL)地址,打开一个收藏地址,使用搜索引擎等等。机器可以理解的信息:语义Web与此相反,语义     

语义网、语义网格和语义网络

语义网、语义网格和语义网络是三个容易混淆的概念,语义网是对WWW的延伸,其目标是使得Web上的信息具有计算机可以理解的语义,并为人们提供各种智能服务;语义网格是语义Web和网格相结合产生的新的研究领域;语义网络是知识的一种图解表示,它由节点和弧线或链线组成.通过对三者的概念、特征、应用等方面进行介绍从而说明了三者的联系以及不同,并说明了今后对三者的研究方向和重点问题.     

语义网与本体

深入了解了语义网的由来,研究语义网的结构,通过对Unicode和URI、XML+NS+XML Schema、RDF+RDF Schema、Ontology vocabulary 4个层次模型来铸造稳固的结构。将本体技术融入到语义网运行过程中,实现知识共享和交换的目标。     

语义Web

介绍了语义Web的概念有本体模型在其中的运用，比较了XML/XML Schema和RDF/RDF Schema在语义表示方面的使用，提出RDF（S）更适合于语义Web；最后讨论了扩展RDF开发语义Web应用所应该注意的问题。     

Metcalfe's law, Web 2.0, and the Semantic Web

The power of the Web is enhanced through the network effect produced as resources link to each other with the value determined by Metcalfe's law. In Web 2.0 applications, much of that effect is delivered through social linkages realized via social networks online. Unfortunately, the associated semantics for Web 2.0 applications, delivered through tagging, is generally minimally hierarchical and sparsely linked. The Semantic Web suffers from the opposite problem. Semantic information, delivered through ontologies of varying amounts of expressivity, is linked to other terms (within or between resources) creating a link space in the semantic realm. However, the use of the Semantic Web has yet to fully realize the social schemes that provide the network of users. In this article, we discuss putting these together, with linked semantics coupled to linked social networks, to deliver a much greater effect.     

Semantic Web Services, Part 2

In part 2 of this Trends & Controversies installment, we continue exploring the state of the art, current practices, and future directions for Semantic Web services. SWS aims to bring Semantic Web technology - for representing, sharing, and reasoning about knowledge - to bear in Web service contexts. The objective is to enable a fuller, more flexible automation of service provision and use and the construction of more powerful tools and methodologies for working with services.     

Semantic Web Services, Part 1

Semantic Web services (SWS) has been a vigorous technology research area for about six years. A great deal of innovative work has been done, and a great deal remains. Several large research initiatives have been producing substantial bodies of technology, which are gradually maturing. SOA vendors are looking seriously at semantic technologies and have made initial commitments to supporting selected approaches. In the world of standards, numerous activities have reflected the strong interest in this work. Perhaps the most visible of these is Sawsdl (Weerawarana, 2005). Sawsdl recently achieved Recommendation status at the World Wide Web Consortium. Sawsdl's completion provides a fitting opportunity to reflect on the state of the art and practice in SWS - past, present, and future. This two-part installment of Trends & Controversies discusses what has been accomplished in SWS, what value SWS can ultimately provide, and where we can go from here to reap these technologies' benefits.     

The Semantic Web: Collective Intelligence on the Web

The World Wide Web has turned hypertext into a success story by enabling world-wide sharing of unstructured information and informal knowledge. The Semantic Web targets the sharing of structured information and formal knowledge pursuing objectives of achieving collective intelligence on the Web. Germane to the structure of the Semantic Web is a layering and standardization of concerns. These concerns are reflected by an architecture of the Semantic Web that we present through a common use case. Semantic Web data for the use case is now found on the Web and is part of a quickly growing set of Semantic Web resources available for formal processing.     

语义网初探

语义网是对WWW的延伸,其目标是使得Web上的信息具有计算机可以理解的语义,并为人们提供各种智能服务。在介绍语义网概念及其体系结构的基础上,对3大关键技术:XML、RDF、Ontology作一简要的概述,讨论了其要解决的主要问题,明确今后主要的研究方向与重点问题。