The Semantic Management of Middleware

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Recht ex machina. Canadian Semantic Web.


Semantic Web Services, Processes and Applications. Ontology Alignment. Social Networks and the Semantic Web. The Semantic Web. Semantic Web Services Challenge. One main reason is that a Semantic Service Bus. In addition, there are different semantically annotated to express the requirements to Semantic Web Service technologies. This engine comes with an Axis1 playing the associated with a single process definition. We have categorization e. The sections 5. Therefore some of the concepts from domain ontologies.

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The prototype we present supports service discovery based on WSDL or semantic descriptions of services and Grounding defines a mapping of the Process to service invocation. The mapping from OWL-S dynamic binding to services.

For this the so-called Find operation parameters, which are specified as OWL and Bind mechanism [2] is supported. For each particular semantic Web is given explicit semantics, enabling the service bus to service technology and service description language the perform discovery and invocation of semantically discovery, selection and invocation of services the SSB identical services automatically, even if the syntax in the has to support are implemented differently.

WSDL descriptions is different. The Profile is used for discovery while Process and Grounding are 5. The data mediation and registry [11]. OWL-S does not jUDDI [4] , for compliant services, selects the most distinguish between requirements andandcapabilities SSB management of invocation framework appropriate service port and invokes it using the binding services, both are expressed as an OWL-S service information about the service [11].

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SSB description. Service discovery. Architecture of the Semantic Service Bus prototype. The selected service has the same semantics as the Capabilities and Interfaces. Capabilities requested service, yet it could have a different WSDL describe the functional aspects of the offered interface, especially different data type definitions. Thus, services in terms of pre- and post-conditions, it is necessary to lift the input data as provided by the assumptions and effects.

While pre- and post- requester to its ontological OWL representation as conditions describe the state of the local information defined in the OWL-S description and then lower it to the space i. Only in this service invocation, respectively, assumptions and way can the selected service be invoked. This lifting and effects refer to state and its modifications in a global lowering, also called data mediation, is provided by XSL- point of view.

Interfaces give information about the transformations which are specified in the OWL-S operations of the service in terms of choreography grounding. The WSDL service can finally be invoked as and orchestration. The choreography defines the specified in the corresponding WSDL binding. After behavioural interface that service consumers need to invocation of the service and another round of lifting and comply with in order to communicate correctly.

We have achieve its capabilities. Goals describe the user's need of a Web Service solving a OWL-S supports the description of stateful services specific problem. Therefore, the goal defines the through the use of the process model OWL-S preconditions and assumptions as well as effects and Process. The service requester uses the process model to Using this functional description, a reasoner can communicate with the service in a conversation, which discover WSMO Web Services, which provide the can potentially span several operations.

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One shortcoming of the OWL-S process model is that it doesn't support callback operations, i. Mediators are useful to discovered and invoked dynamically by the bus. In this define links between Goals and Web Services case the discovery has to be extended to also include using wgMediators or merge terms from matchmaking of process models of the service requester different domain ontologies using ooMediators.

This is a difficult task and To reuse existing goals or to refine abstract goals, actually a process mediation problem; it is part of our ggMediators can be used while wwMediators future work. It relies on four major modelling OWL-S. When necessary, this set used by other WSMO elements in order to describe of properties can be extended e. Therefore requirements [12]. However this is limited to domain terminology.

But it is not possible to specify that the client them by describing their functional, behavioural and that wants to achieve a goal offers a callback operation non-functional properties semantically. Therefore that the called service has to use in order to report the WSMO introduces the concepts of result back to the client. The other services.

The semantics of services is used to enable implementation, the lisp-based Internet Reasoning Service enhanced features like semantic service discovery, IRS-III [9], uses an extended WSMO to perform semantically enhanced itineraries for routing, and capability-based Web Service invocation by means of mediation. These features additionally distinguish the Goals. In the context of this work, we have implemented a Due to the existence of several competing Semantic management and invocation framework extension at the Web Service technologies annotating Web Services with BPEL engine's service container that delegates the semantics the SSB has to provide support for multiple invocation of services required by semantically annotated semantic description languages.

Both kinds of discovery components e. An SSB must provide entry points synchronously, with WSMO goals submitted to their for applications that need to use the services it provides. It entry point APIs, which take care about discovering and must also provide a management facility to support invoking an appropriate service and sending the response configuration and management of the component back to the requester. The WSMX discovery is done by comprising the bus. So far it is not possible for a client to communicate In general, a goal is not restricted to synchronous with the SSB asynchronously when the WSMO and invocation; it may contain a complex choreography OWL-S infrastructure services are used.

This is mainly description. If this is the case, WSMX tries to discover a due to the fact that the existing framework service with a choreography description that represents implementations support only synchronous interaction the counterpart to the goal's choreography; IRS-III does with the middleware. This hampers the interaction of not support such functionality. Then there may be a applications with stateful services, where the explicit longer communication between the SSB and the control of the applications over the communication is discovered stateful service.

When the result is computed required.

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In WSMX, to the best of our knowledge, it is sent back to the requester. Enabling asynchronous Context :Context. In this case the longer communication between the SSB and service requesters, communication would not only take place between as well as improving the infrastructure service WSMX and the discovered and selected service. However this is not yet implemented. Of special interest for us is the creation of routing itineraries for the SSB based on 6.

Conclusions service compositions defined in BPEL. Defining such routing procedures enriched with semantic information In this paper we have presented the concept of for Web Services and Grid Services is also part of our Semantic Service Bus and its conceptual architecture. A future work. Alonso et al. Web Services. Springer, Andrews et al. Specification, May Box et al. May, Enterprise Service Bus. Curbera et al. Prentice Hall PTR, Domingue et al. Diploma Thesis. Karastoyanova, F. Leymann, J. Nitzsche, B. Wetzstein, and D.

In Proceedings of BPM, Lara et al. Web Services: Distributed Applications without Limits.

XGSN: An Open-source Semantic Sensing Middleware for the Web of Things

Business, Technology and Web, Leipzig, Springer-Verlag Berlin Heidelberg, December Martin et al. McIlraith, T. Son, and H. Semantic Web Services.


Related Papers. By Tammo van Lessen. Linking Semantics Web Service Efforts. By Amit Sheth.