Andreas Friesen - Academia.edu (original) (raw)

Papers by Andreas Friesen

Abstract. A crucial task in process management is the validation of process refinements. A proces... more Abstract. A crucial task in process management is the validation of process refinements. A process refinement is a process description in a more fine-grained representation. The refinement is either with respect to an abstract model or with respect to component’s principle behaviour model. We define process refinement based on the execution set semantics. Predecessor and successor relations of the activities are described in an ontology in which the refinement is represented and validated by concept satisfiability checking. 1

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Proceedings of WEBIST 2006 - Second International Conference on Web Information Systems and Technologies, 2006

This paper describes a semantic approach for modelling security requirements of requesters and pr... more This paper describes a semantic approach for modelling security requirements of requesters and providers of Semantic Web Services. These semantic descriptions can be used either during semantic service discovery or service selection phase for automatic compatibility verification of the security requirements of a service requester and provider. The security requirements model, ontology classifying existing security services and mechanisms, and a semantic matchmaking method relying on description logics are described in detail. This work is related to several semantic and non-semantic Web Services standards. The relationship to the most relevant of them has been worked out.

Lecture Notes in Business Information Processing, 2011

Since 20 years, many traditional firms transform their orientation from products to services, amo... more Since 20 years, many traditional firms transform their orientation from products to services, among them also many potential SAP partners, competitors and customers. Powered by globalization, competition, and the Internet, that process happens globally and at accelerating speed. It breaks existing product supply chains and transforms them into a volatile network of collaborating businesses-the business value network. The network forms around service value propositions of the participants that lead to joint value creation. While SAP and other players have developed quite a sophisticated understanding of on premise software solutions and accompanying services, the field of on-demand software services is relatively new to the industry, and the underlying principles of value creation in many successful new service businesses are often a miracle. Business value networks will become increasingly important in the world's economy in the future. Their appropriate IT support must efficiently realize business collaborations and interactions between globally spread organizations. In the past, Enterprise Interoperability has been often seen as a synonym for Enterprise Application Integration at intra-or inter-organizational level. In the future, the ability to adapt to changing market and business requirements together with the ability to reflect the business adaptations on the level of the connected ICT systems will constitute key challenges for the support of business network formations. Enterprise Interoperability will have to address business value networks not only from ICT viewpoint but also as socio-technical systems from the business and operational perspective. Over the past years, SAP Research was involved into intense research that has taken place to explore the Internet of Services. New ways of developing, hosting, aggregating, mediating and finally consuming services have been described and tested. The developed Service Delivery Framework will be presented as a foundation for a Future Internet platform for business value networks demonstrating the key roles and relationships involved in the formation and value creation of business value networks from the business, operational and technical perspective.

Service-Oriented Frameworks

I-ESA'12 Proceedings, 2013

With the pervasion of cloud computing, enterprises increasingly rely on ecosystems of distributed... more With the pervasion of cloud computing, enterprises increasingly rely on ecosystems of distributed, task-oriented, modular, and collaborative cloud services. In order to effectively manage the complexity inherent in such ecosystems, enterprises are anticipated to depend upon brokerage mechanisms for performing policy-based governance and for recommending optimal services to consumers. Such mechanisms crucially depend upon the existence of a uniform, platform-independent representation of services, consumer preferences, and policies concerning service delivery. In this paper we propose an ontology-based approach to such a representation.

2014 IEEE 6th International Conference on Cloud Computing Technology and Science, 2014

Communications in Computer and Information Science, 2015

Cloud service brokerage leads to creation of ecosystems of highly distributed, task-oriented, mod... more Cloud service brokerage leads to creation of ecosystems of highly distributed, task-oriented, modular, and collaborative cloud services managed by a broker. A broker is striving to create optimized cloud service consumption lifecycle in terms of cost, flexibility and business agility. In order to effectively manage the complexity inherent in such ecosystems, enterprises are anticipated to crucially depend upon cloud service brokerage (CSB) mechanisms. This work focuses on the management of hosting platforms participating in the ecosystem of a cloud service brokerage platform. The hosting platforms are as any other actor of a cloud service brokerage ecosystem evolving over time. The hosting platforms may join or leave the ecosystem, add or remove hosting services to the ecosystem or change characteristics of the available hosting services. The broker is thereby confronted with the issue of keeping its business policy offered to the service providers and service consumers up to date concerning the hosting alternatives in the ecosystem. We present a strategy for derivation of business policies from service descriptions of hosting services. The strategy is showcased in Linked USDL – our chosen technical specification for enabling platform-agnostic data exchanges.

IFIP Advances in Information and Communication Technology, 2014

With the rise of cloud computing, enterprises increasingly rely for their daily operations on het... more With the rise of cloud computing, enterprises increasingly rely for their daily operations on heterogeneous externally-sourced cloud services that span different levels of capability. Their IT environment is thus progressively transformed into an ecosystem of intertwined infrastructure, platform, and application services. To effectively manage the ensuing complexity, enterprises are anticipated to increasingly rely on cloud service brokerage (CSB). This work presents a conceptual architecture for a framework which provides solutions with respect to the quality assurance and optimisation dimensions of CSB in the context of virtual enterprises. The framework revolves around three general themes, namely governance and quality control, failure prevention and recovery, and optimisation.

Establishing the Foundation of Collaborative Networks, 2007

Service-oriented computing is being adopted at an unprecedented rate, making the effectiveness of... more Service-oriented computing is being adopted at an unprecedented rate, making the effectiveness of automated service discovery an increasingly important challenge. UDDI has emerged as a de facto industry standard and fundamental building block within SOA infrastructures. Nevertheless, conventional UDDI registries lack means to provide unambiguous, semantically rich representations of Web service capabilities, and the logic inference power required for facilitating automated service discovery. To overcome this important limitation, a number of approaches have been proposed towards augmenting Web service discovery with semantics. This paper discusses the benefits of semantically extending Web service descriptions and UDDI registries, and presents an overview of the approach put forward in project FUSION, towards semantically-enhanced publication and discovery of services based on SAWSDL.

In the last few years SAP introduced Service-oriented Architecture as a blueprint for an adaptabl... more In the last few years SAP introduced Service-oriented Architecture as a blueprint for an adaptable, flexible, and open IT architecture for developing services-based, enterprise-scale business solutions. An Enterprise Service is typically a series of Web services combined with business logic that can be accessed and used repeatedly to support a particular business process. Aggregating Web services into business-level enterprise services provides a more meaningful foundation for the task of automating enterprise-scale business scenarios. At the same time, SAP Research was investigating in numerous research projects how ontologies, reasoning, semantic web services technologies, and advanced business process modelling technologies can be applied in order to improve technical foundation behind SAP SOA and business modelling. In this extended abstract we describe some selected business process composition and integration scenarios identified as potential candidates for application of business process composition techniques, semantic technologies, ontologies, and reasoning. We further identify some challenges linked to application of such advanced technologies in the context of modelling and software engineering.

Lecture Notes in Computer Science

ABSTRACT There are various B2B scenarios where many candidate services with the same or similar c... more ABSTRACT There are various B2B scenarios where many candidate services with the same or similar capability (provided by the same or even different service providers) can be used for enterprise application integration. Hence, a requester driving a B2B integration scenario can choose among several candidate services offering a capability satisfying its requests. However, the optimal choice of the service to be invoked often depends on the parameters of the request at run-time and preferences of the requester. This article describes an approach for a dynamic (at run-time) web service selection based on semantic interpretation of offered service capabilities and the parameters specifying the run-time request. The proposed solution takes into account special conditions on service usage either contractually agreed between requester and provider or specified by the requester without the knowledge of the provider. In general, those conditions restrict the interpretation of the original service capabilities as offered by a service provider (and discovered by the service requester) and influence the choice of a service. The approach is illustrated on an example from the shippercarrier domain.

The FUSION approach proposes both a conceptual framework and a system architecture that supports ... more The FUSION approach proposes both a conceptual framework and a system architecture that supports the composition of business processes using semantically annotated web services as building blocks. Results will be validated by supporting collaborative commercial proof-of-concept pilots. The FUSION approach will facilitate trans-national pilot cases having operations spanning the enlarged Europe, in particular: integration of transactions of a franchising firm, provision of career and human resource management services, collaboration of companies in a chain of schools of foreign languages. The paper provides an overview on the FUSION approach and illustrates how it can be applied on one of the pilot cases.

Workshop proceedings of the sixth international conference on Web engineering - ICWE '06, 2006

Abstract We define a high-level model to mathematically capture the semantical meaning of Semanti... more Abstract We define a high-level model to mathematically capture the semantical meaning of Semantic Web Service Discovery Locations (SWS Discovery Services), their distribution and communication mechanisms. This model captures, to our best knowledge, all published semantic web service discovery approaches relying on capability-based semantic matchmaking.