A linked data compliant framework for dynamic and web-scale consumption of web services

The While Semantic Web Services (SWS) research aims at automating Web service tasks such as discovery, orchestration and execution, its take-up is very limited so far. This is due to several reasons, such as inherent complexity of existing SWS frameworks and the considerable costs involved in creating correct SWS descriptions. In addition, while semantics are in use to enable tasks such as discovery, interaction between service consumers, providers and brokering environments is still not supported by semantic message descriptions. On the other hand, the Linked Data approach has produced a set of established principles for sharing and describing data, such as RDF as representation language and the integral use of dereferencable URIs. In this paper we propose to apply those principles to expose Web services and Web APIs and introduce a framework in which service registries as well as services contribute to the automation of service discovery, and hence, workload is distributed more efficiently. This is achieved by developing a Linked Data compliant Web services framework with that communicate with semi-centralised registries but compute their suitability for a given request themselves. All communications among different framework components are using RDF-based message protocols including service input and output. This framework aims at optimizing load balance and performance by dynamically assembling services at run time in a massively distributed Web environment

Business Grid Services

Grid services have come to represent the synthesis of web services and grid computing paradigms. Web services provide the means to modularize software, enabling loosely coupled and novel synthesis. Grid computing removes the binding between functional software components and specific hosting hardware, enabling software to be deployed dynamically over a network (e.g. intra-, extra- or inter-net). Applying the constructs of grid computing to the service orientation of enterprise software will allow business service networks to utilize more specialized services. An upper service ontology that enables business grid services to be described and then related to the grid hosting platform is presented. Explicit knowledge is required for enterprise software, hosting servers and the domain that can then be utilized by both SLA and reservation systems. The ontology presented is derived from and validated using a collection of web services taken from leading investment banks

Extending OWL-S for the Composition of Web Services Generated With a Legacy Application Wrapper

Despite numerous efforts by various developers, web service composition is still a difficult problem to tackle. Lot of progressive research has been made on the development of suitable standards. These researches help to alleviate and overcome some of the web services composition issues. However, the legacy application wrappers generate nonstandard WSDL which hinder the progress. Indeed, in addition to their lack of semantics, WSDLs have sometimes different shapes because they are adapted to circumvent some technical implementation aspect. In this paper, we propose a method for the semi automatic composition of web services in the context of the NeuroLOG project. In this project the reuse of processing tools relies on a legacy application wrapper called jGASW. The paper describes the extensions to OWL-S in order to introduce and enable the composition of web services generated using the jGASW wrapper and also to implement consistency checks regarding these services.Comment: ICIW 2012, The Seventh International Conference on Internet and Web Applications and Services, Stuttgart : Germany (2012

Semantic annotations for WSDL and XML schema

Anotaciones semánticas para WSDL y esquema XML (SAWSDL) define cómo añadir anotaciones semánticas en varias partes de un documento WSDL como la estructura de los mensajes de entrada y de salida, interfaces y operaciones. Los atributos anexos están definidos en esta forma dentro de los marcos de extensibilidad de WSDL 2.0 [WSDL 2.0], WSDL 1.1 [WSDL 1.1] y XML Schema

Semantic Web Service Engineering: Annotation Based Approach

Web services are an emerging paradigm which aims at implementing software components in the Web. They are based on syntactic standards, notably WSDL. Semantic annotation of Web services provides better qualitative and scalable solutions to the areas of service interoperation, service discovery, service composition and process orchestration. Manual annotation is a time-consuming process which requires deep domain knowledge and consistency of interpretation within annotation teams. Therefore, we propose an approach for semi-automatically annotating WSDL Web services descriptions. This is allowed by Semantic Web Service Engineering. The annotation approach consists of two main processes: categorization and matching. Categorization process consists in classifying WSDL service description to its corresponding domain. Matching process consists in mapping WSDL entities to pre-existing domain ontology. Both categorization and matching rely on ontology matching techniques. A tool has been developed and some experiments have been carried out to evaluate the proposed approach

A topic modeling approach for web service annotation

The actual implementation of semantic-based mechanisms for service retrieval has been restricted, given the resource-intensive procedure involved in the formal specification of services, which generally comprises associating semantic annotations to their documentation sources. Typically, developer performs such a procedure by hand, requiring specialized knowledge on models for semantic description of services (e.g. OWL-S, WSMO, SAWSDL), as well as formal specifications of knowledge. Thus, this semantic-based service description procedure turns out to be a cumbersome and error-prone task. This paper introduces a proposal for service annotation, based on processing web service documentation for extracting information regarding its offered capabilities. By uncovering the hidden semantic structure of such information through statistical analysis techniques, we are able to associate meaningful annotations to the services operations/resources, while grouping those operations into non-exclusive semantic related categories. This research paper belongs to the TelComp 2.0 project, which Colciencas and University of Cauca founded in cooperation.En términos prácticos, la implementación de mecanismos de recuperación de servicios basados en semántica ha sido limitada, debido al costoso procedimiento que involucra la especificación formal de servicios. Este procedimiento comprende una tarea dispendiosa de anotación semántica, la cual se lleva a cabo manualmente por desarrolladores de servicios, quienes, además, deben conocer modelos para la descripción semántica de este tipo de recursos (p. ej. OWL-S, WSMO, SAWSDL). Para superar esta limitación, este artículo introduce una propuesta para la anotación de servicios web, basada en el procesamiento de su documentación disponible, para extraer la información relacionada con las capacidades que estos ofrecen. Al descubrir la estructura semántica oculta de dicha información, a través de técnicas de análisis estadístico, el mecanismo propuesto es capaz de asociar anotaciones relevantes a las operaciones/recursos de los servicios, así como agruparlos en categorías semánticas no exclusivas. Este artículo de investigación está enmarcado en del proyecto TelComp 2.0, financiado por Colciencias y la Universidad del Cauca

Un enfoque basado en modelos temáticos para la anotación semántica de servicios

The actual implementation of semantic-based mechanisms for service retrieval has been restricted, given the resource-intensive procedure involved in the formal specification of services, which generally comprises associating semantic annotations to their documentation sources. Typically, developer performs such a procedure by hand, requiring specialized knowledge on models for semantic description of services (e.g. OWL-S, WSMO, SAWSDL), as well as formal specifications of knowledge. Thus, this semantic-based service description procedure turns out to be a cumbersome and error-prone task. This paper introduces a proposal forservice annotation, based on processing web service documentation for extracting information regarding its offered capabilities. By uncovering the hidden semantic structure of such information through statistical analysis techniques, we are able to associate meaningful annotations to the services operations/resources, while grouping those operations into non-exclusive semantic related categories. This research paper belongs to the TelComp 2.0 project, which Colciencas and University of Cauca founded in cooperation.En términos prácticos, la implementación de mecanismos de recuperación de servicios basados en semántica ha sido limitada, debido al costoso procedimiento que involucra la especificación formal de servicios. Este procedimiento comprende una tarea dispendiosa de anotación semántica, la cual se lleva a cabo manualmente por desarrolladores de servicios, quienes, además, deben conocer modelos para la descripción semántica de este tipo de recursos (p. ej. OWL-S, WSMO, SAWSDL). Para superaresta limitación, este artículo introduce una propuesta para la anotación de servicios web, basada en el procesamiento de su documentación disponible, para extraer la información relacionada con las capacidades que estos ofrecen. Al descubrir la estructura semántica oculta de dicha información, a través de técnicas de análisis estadístico, el mecanismo propuesto es capaz de asociar anotaciones relevantes a las operaciones/recursos de losservicios, así como agruparlos en categorías semánticas no exclusivas. Este artículo de investigación está enmarcado en del proyecto TelComp 2.0, financiado por Colciencias y la Universidad del Cauca