ODEGSG Framework, Knowledge-Based Annotation and Design of Grid Services

The Web, as we know it, is a collection of human readable pages that are virtually unintelligible to computer programs. For that reason, it has been called the “eyeball” Web. While the Web emerged as a World Wide repository of digitized information, by and large, the very same information is not available for automatic computation. In recent years two parallel efforts emerged that have the potential of overcoming this paradox: the first effort is the Semantic Web which provides the tools for the explicit markup of the content of Web pages; the second effort is the development of Web Services which results in a Web where programs act as independent agents to become the producers and consumers of information and enable automation of business transactions.In this talk I will focus on research that attempts to bridge the gap between the Web as we know it, the Semantic Web and Web services. Under this approach, I propose the vision of Web services as autonomous goal-directed agents which select other agents to interact with, and flexibly negotiate their interaction model, acting at times in client server mode, or at other times in peer to peer mode. The resulting Web services, that I call Autonomous Semantic Web services, utilize ontologies and semantically annotated Web pages to automate the fulfillment of tasks and transactions with other Web agents. In particular, Autonomous Semantic Web services use the Semantic Web to support capability based discovery and interoperation at run time. A first step towards this vision is the development of formal languages and inference mechanisms for representing and reasoning with core concepts of Web services. DAML-S (the Darpa Agent Markup Language for Services) is the first attempt to define such a language. I will give a brief overview of DAML-S and its relations with the Semantic Web and Web services. In addition, I will provide concrete examples of computational models of how DAML-S can be viewed as the first step in bridging the gap between the Semantic Web and current proposed industry standards for Web services. I will provide concrete examples of DAML-S in action, discuss challenges still open in the bridging between the Semantic Web and Web services and provide a roadmap to get us from today’s Web to the Web of autonomous Semantic Web services.KeywordsFormal LanguageCore ConceptDigitize InformationAutomatic ComputationBusiness TransactionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Future information, knowledge and content infrastructures which provide highly automatic support in fulfilling users goals will most likely rely on some form of Grid computing. In combination with Semantic Web technologies and Semantic Web services, this infrastructure will be much enhanced to form the Semantic Grid. Last but not least, one of the major driving forces for the Web and its future derivatives is actual content which can range from multimedia data (with some meta data) to "intelligent objects" i.e. content that itself, can either exhibit behavior or at least, carry semantic information that can (and must) be interpreted by the services of the Semantic Grid. This paper proposes GRISINO, an integrated infrastructure for Semantic Web Services, Intelligent Content Objects and Grid that are brought together in the search for an emerging solution that cope with rapidly increasing demands and complexity of next generation distributed applications.

An weighted ontology-based semantic similarity algorithm for web service

Users of Web and grid services often must temporarily delegate some or all of their rights to a software entity to perform actions on their behalf. The problem with the typical grid services approach (X. 509 proxy certificates) is that commercial Web services tooling fails to recognize these certificates or process them properly. The security assertion markup language (SAML) is a standardized XML-based framework for exchanging authentication, authorization and attribute information. SAML has broadening commercial support but lacks delegation capabilities. To address this shortcoming, we exploit SAML's inherent extensibility to create a delegation framework for Web and grid services that supports both direct and indirect delegation. We develop a set of verification rules for delegation tokens that rely on WS-Security X.509 signatures, but do not force any trust relationship between the delegatee and the target service. We have implemented the framework on two common Web service hosting environments: Java/Tomcat and .NET. By leveraging existing Web services standards, we make it easier for Grid practitioners to build and consume Web and grid services without resorting to grid-specific protocols.

Semantic Web Services are the key technology providing services for the users' convenience in the semantic web environment. Many companies in various fields are researching and developing languages for constructing Semantic Web Services such as DAML-S, WSDL, X-LANG and BPEL4WS. DAML-S is a method that accesses the existing Web Service method from a semantic web environment. However, the current Semantic Web Services Discovery System does not provide sufficient processing of quality factors (performance, accessibility, availability, reliability and transaction) nor reliable and accurate service results desired by the user through a UDDi search method. The present study analyzes the disadvantages of the current web services and suggests a Semantic Web Services Discovery System based on QoS applying semantic web technologies as a solution to the problems. The suggested system provides a UDDi and DAML-S based discovery engine to allow efficient web service discovery and composition.

Services are an increasingly important part of the Web, and they are a necessary component of the Semantic Web. Semantic Web Services (SWS) are a research effort towards automation of the use of Web services, enhancing existing SOA capabilities with intelligent and automated integration. Recently, we have introduced WSMO-Lite, a lightweight service ontology intended for semantic annotations of the Web Service Description Language WSDL. In contrast to preceding SWS frameworks such as OWL-S and WSMO, WSMO-Lite simplifies the semantic descriptions and enables bottom-up semantic annotation of Web services, but very importantly, it also relaxes the requirements on completeness of semantic descriptions, which enables building incremental layers of semantics on top of existing service descriptions. In this work, we describe various useful subsets of the extent of semantic annotation on Web services with respect to the requirements of SWS automation tasks; and we detail the means of validating SWS descriptions with flexible levels of strictness.

The open grid services infrastructure (OGSI) defines a distributed system framework by integrating grid and Web services technologies to facilitate the sharing of various resources, which result in grid service. Grid service inherits the features from Web service, aiming at enabling interoperability among heterogeneous grid application. However, in the open grid services architecture (OGSA), grid services are isolated, it is difficult building a grid service management framework which can work across organizations. Based on BPEL4WS, this paper proposes an agent-oriented grid service modeling framework to address the difficulties in developing grid applications based on grid services.

On the web, several key emerging technologies are shaping the landscape and creating for members of web-based communities a whole new experience. In particular the semantic web, web services, The Grid and related technologies are on their way to transform the way users interact on the web. As an illustration of this potential transformation, we propose in this article the application of the semantic web technology to a new breed of web-based community called weblogs. For convenience, parts of the content of blogs are described in the Rich Site Summary (RSS) format to be automatically read by an aggregator called a feed reader. However, the enormous number of blogs on the web makes it difficult for a single person to track down all documents of interest on a particular subject. To assist a blog user, we developed a search service based on the semantic web technology.

Semantic Web services is considered as the concept bringing the web to its full potential by combining the best features of web services, agent technology, grid and the Semantic web. In this paper we present a semantic Web Services platform based on software agent (JASW), which introduces Semantic web and software agent and takes the automated discovery, selection, orchestration and invocation of Web services as application background. In the platform, we adopt Semantic web to accurately describe Web services, and use software agent to implement discovery, selection, and orchestration of Web services.

In this paper we discuss our experience with the design, development and deployment of MneMojno Semantic Web Service and Mobile Application. MneMojno makes use of Semantic Web Technologies to create a Web service and a mobile application for rating and providing detail information about food products. This paper introduces the main components of the system: a framework to capture information about food products from various sources, a semantic web service and a framework to visualize and analyze usage statistics. Finally, we discuss challenges and problems we faced during the development and present our conclusions and future directions for exploration in terms of developing MneMojno further.

Description logic is used as the formal theoretical foundation of semantic web services, the paper analyzed description language of Semantic Web Services OWL-S, WSDL-S, WSML and SWSL. Give a formal definition of description about semantic web services, further Web services is interpreted with the semantic of description logic. The satisfiability and subsumption in description logic can be applied to inferring semantic web services. For further research semantic annotation of web services, relation between web services and services, reasoning problems for semantic web services, our work was important and fundamental.

Standards for image annotation using Semantic Web

Summary form only given. The emerging concept of semantic Web services aims at more sophisticated Web Service technologies: on basis of semantic description frameworks, intelligent mechanisms are envisioned for discovery, composition, and contracting of Web services. The tutorial explains the current state of the art in semantic Web services on basis of the Web service modeling ontology WSMO and related initiatives. Commencing from the vision and arising challenges for semantic Web services, the tutorial in detail explains the specifications of recent frameworks for semantic Web services and presents the Web service execution environment WSMX as the WSMO reference implementation. The tutorial consists of three main sections that subsequently provide a complete overview of semantic Web services and the latest status of WSMO. The tutorial addresses academic as well as industrial researches and developers that are working with Web services and are interested in semantic Web services.

Modern grid and Web technologies provide straightforward access to applications and services running on remote resources. The user (which may be a software developer or even an application) should be able to discover such a service and dynamically load an interface to interact with it. While some software systems support either fully or partially automatic creation of client software to access Web services, fewer support grid services in the same way. This paper introduces a new system that automatically generates client software to allow access to both grid and Web services. Although designed as a stand-alone tool for accessing any Web or grid service, we demonstrate its usefulness in the context of the SymGrid framework for grid-based symbolic computations.

SGrid: a service-oriented model for the Semantic Grid