This paper presents the motivation and design decisions for the Web Services Grid Application Framework (WS-GAF), which is a mapping of Grid architecture requirements onto the Web Services Architecture. The goal for WS-GAF is to describe a framework for building Grid applications that adheres to the principles of service-oriented architectures and utilises existing Web Services technologies. Th...

In this paper we show how UML 2.0 sequence diagrams can be used for the design of Web service choreographies with time constraints and how these sequence diagrams can be extended with frames for the description of Web service choreographies. We then show how the diagrams can be translated into WS-CDL documents. This translation is of interest, since non-XML experts can find it difficult to impl...

WS-BPEL is de-facto industry standard for business processes. One of its major shortcomings is lack of temporal management capabilities. WS-BPEL offers no possibility for definition, calculation and monitoring of temporal values such as activity duration and deadlines as well as checking the temporal conformance of processes. This paper tackles temporal management of WS-BPEL based on two differ...

In today’s global network-based environment, where mission-critical applications typically run on highly distributed systems, customers expect reliable, available, and secure services. Supporting security becomes an important issue in service-oriented architecture (SOA). This paper describes how to simultaneously support both dynamic security policies and separation of concerns when developing ...

Several organizations have already realized the potential of using WS-BEPL, the Process Execution Language for Web Services, to model the behavior of Web services in business processes. WS-BPEL provides a model for describing simple or complex interactions between business partners. In some cases, WS-BPEL process designs can be highly complex, due, for example, to the vast number of Web service...

The Web Services Choreography Description Language (WS-CDL) is an XML-based language for specifying business protocols for \emph{web services enabled} collaborative processes. The use of visual notations in modeling web services choreography has so far been done in an ad hoc fashion as seen in the literature. This paper presents a choreography example in four different visual modeling notations...

The lack of a single authority in the Grid environment is perhaps the biggest source of security and interoperability challenges faced by Grid systems designers. A strong commitment to meaningful, interoperable security is crucial for fostering Grid adoption and buy-in. The issues of securityinteroperability are twofold: (a) grids require federation of distinct trust and security domains, and (...

The WS-Policy4MASC language and MiniZnMASC middleware for policy-driven management of service-oriented systems enable making IT system management decisions that maximize diverse business value metrics (e.g., profit, customer satisfaction). However, their past support for alignment with high-level business considerations was weak. Therefore, we introduce a new extension of WS-Policy4MASC that sp...

Web Services (WS) are an important tool for the integration of enterprise applications. With a growing set of WS related standards (WS-*), the technology has become increasingly more complicated to configure and manage, even more so when the Quality of Service (QoS) requirements of the system are changing. This paper presents the results of a study conducted on the ability of the major Web Serv...

This chapter identifies the main security requirements for Web services and it describes how such security requirements are addressed by standards for Web services security recently developed or under development by various standardizations bodies. Standards are reviewed according to a conceptual framework that groups them by the main functionalities they provide. Standards that are covered inc...