Temporal management and assurance of temporal compatibility is an important quality criteria for processes within and across organizations. Temporal conformance increases QoS and reduces process execution costs. WS-BPEL as the accpetd industry standard lacks sufficient temporal management capabilities. In this paper we introduce BPEL-TIME, a WS-BPEL extension for time management purposes. It al...

135 ABSTRACT Quick changes in requirements and opportunities in world market needs different levels of cross-organizational collaboration for integrating distributed information systems, information sharing and coordination of organizational processes. Nowadays, Web Services are the most common technology to meet these requirements. Web Services Choreography Description Language (WS-CDL), a Wor...

The main goal of this study was to obtain insight about the factors that influence students' ability to learn during a field trip, in order to improve the planning and execution of learning field trips. The study was conducted in the context of a 1-day geological field trip for high school students in Israel. Three domains were tested by observations and questionnaires: (1) the nature of the le...

The BPEL4People and WS-HumanTask extensions to the BPEL proposal de ne the state of the art in resource management and work distribution in business process execution languages. In this paper, we use the work ow resource patterns as an evaluation framework to assess the capabilities of BPEL4People and WS-HumanTask in these areas and identify several areas where there is opportunity for further ...

With the growing demand on Web Services, self-adaptation in the highly-dynamic environment is becoming a key capability of service-based systems. As a solution for Web services to provide added value and high QoS, combining self-* and policies allows reducing management complexity and effectively drives adaptation. Also, providers must participate in the self-adaptation process as they are awar...

Controlling access to the Web services of public agencies and private corporations depends primarily on specifying and deploying functional security rules to satisfy strict regulations imposed by governments, particularly in the financial and health sectors. This paper focuses on one aspect of the SELKIS and EB3SEC projects related to the security of Web-based information systems, namely, the a...

If any data is stored on publicly available services, then it is obligatory for the service to apply different security policies in order to prevent information leakage to unauthorized users. This also applies to e-Science gateways, where sensitive (for example, medical) data might be stored. Moreover, e-Science gateways usually enable the usage of distributed computing infrastructures that app...

Some solutions have been proposed to deal with the establishment of Web service relationships. For instance, a consortium has developed the Web Services Trust Language (WS-Trust) that offers a trust model for Web services. However, trust is one aspect in a set of aspects involved in Web service security that includes, for instance, privacy preservation. Based on this fact, the goal of this pape...

An ever-growing number of XML-based languages are used to describe Web Service related issues such as security (WS-Security Policy), access control (XACML), or privacy (P3P-WS). While it is desirable to specify policies in a declarative way, these languages expose great diversity in both syntax and semantics making it hard to realize a unified system. Our contribution to this problem is twofold...

Cloud computing offers a realization of SOA in which IT resources are dynamically provisioned as services to consumers using flexible provisioning and pricing models. When provisioning such services, providers and consumers must first agree over the service usage terms and conditions, which are captured in Service Level Agreements (SLAs). In this paper, we propose a policy-based framework with ...