Open semantic service networks

Online service marketplaces will soon be part of the economy to scale the provision of specialized multi-party services through automation and standardization. Current research, such as the *-USDL service description language family, is already defining the basic building blocks to model the next generation of business services. Nonetheless, the developments being made do not target to interconnect services via service relationships. Without the concept of relationship, marketplaces will be seen as mere functional silos containing service descriptions. Yet, in real economies, all services are related and connected. Therefore, to address this gap we introduce the concept of open semantic service network (OSSN), concerned with the establishment of rich relationships between services. These networks will provide valuable knowledge on the global service economy, which can be exploited for many socio-economic and scientific purposes such as service network analysis, management, and control

Bid-Centric Cloud Service Provisioning

Bid-centric service descriptions have the potential to offer a new cloud service provisioning model that promotes portability, diversity of choice and differentiation between providers. A bid matching model based on requirements and capabilities is presented that provides the basis for such an approach. In order to facilitate the bidding process, tenders should be specified as abstractly as possible so that the solution space is not needlessly restricted. To this end, we describe how partial TOSCA service descriptions allow for a range of diverse solutions to be proposed by multiple providers in response to tenders. Rather than adopting a lowest common denominator approach, true portability should allow for the relative strengths and differentiating features of cloud service providers to be applied to bids. With this in mind, we describe how TOSCA service descriptions could be augmented with additional information in order to facilitate heterogeneity in proposed solutions, such as the use of coprocessors and provider-specific services

Evolution and overview of Linked USDL

For more than 10 years, research on service descriptions has mainly studied software-based services and provided languages such as WSDL, OWL-S, WSMO for SOAP, and hREST for REST. Nonetheless, recent developments from service management (e.g., ITIL and COBIT) and cloud computing (e.g. Software-as-a-Service) have brought new re- quirements to service descriptions languages: the need to also model business services and account for the multi-faceted nature of services. Business-orientation, co-creation, pricing, legal aspects, and security issues are all elements which must also be part of service descriptions. While ontologies such as e service and e value provided a first modeling attempt to capture a business perspective, concerns on how to contract services and the agreements entailed by a contract also need to be taken into account. This has for the most part been disregarded by the e family of ontologies. In this paper, we review the evolution and provide an overview of Linked USDL, a comprehensive language which provides a (multi-faceted) description to enable the commercialization of (business and technical) services over the web

Enhancing Service Lifecycle Management - Costing as Part of Service Descriptions

Outsourcing of IT and business processes results in an increased exchange of services. For inter-organizational service exchange to be successful, the participating network players have to establish unified and thus interoperable means of service description. An analysis of contemporary approaches identified a deficit of almost all approaches to address monetary aspects of a service, especially costs. This paper argues that costs are prevalent in almost all stages of a services’ lifecycle, and thus its’ role within Service Lifecycle Management (SLM) is paramount. Recognizing this discrepancy, the paper proposes a basic version of a costing model that allows for a multi-periodic depiction of service-related costs as part of a service description. It is modeled and implemented as an extension of USDL, the Unified Service Description Language. A case example from the financial services industry demonstrates the artifact’s applicability

DEGREE OF COMPETITION IN THE U.S. PEANUT BUTTER INDUSTRY: A DYNAMIC ERROR CORRECTION APPROACH

Reforms in the U.S. peanut program entail a reduction in support price of peanuts. The degree to which price reduction is passed on to final consumers of peanut butter is directly related to the degree of competition in the peanut butter market. To assess the impact of changes in the peanut program on final consumers, it is necessary to know the degree of competition in the peanut butter industry. A dynamic error correction model (ECM) developed by Steen and Salvanes is estimated using nonlinear-three-stage-least-squares procedure to measure the degree of competition. Results indicate that the market is characterized by perfect competition in the short-run. The hypothesis of perfect competition is rejected in the long-run, although the long-run solution is close to a perfectly competitive behavior. This result has important implications for the peanut butter industry. Reductions in the support price of peanut may not be fully passed on to peanut butter consumer, but the consumers' welfare gain will certainly be much higher than what it would have been if the market was collusive in structure.Agribusiness, Industrial Organization,

Survey of Service Description Languages and Their Issues in Cloud Computing

Along with the growing popularity of cloud computing technology, the amount of available cloud services and their usage frequency are increasing. In order to provide a mechanism for the efficient enforcement of service-relevant operations in cloud environment, such as service discovery, service provision, and service management, a completed and precise service specification model is highly required. In this paper, we conducted a survey on existing service description languages applied in three different domains - general services, Web/SOA services, and cloud services. We discussed and compared the past literature from seven major aspects, which are: (1) domain, (2) coverage, (3) purpose, (4) representation, (5) semantic expressivity, (6) intended users, and (7) features. Additionally, two core dimensions semantic expressivity and coverage are employed to categorize and analyse the key service description languages by using Magic Quadrant methodology. These two dimensions are regarded as the most essential factors for the evaluation of a service description model. Based on this analysis, we concluded that Unified Service Description Language (USDL) is the language with the widest coverage from business, technical and operational aspects, while OWL-S is the one that has the highest semantic expressivity. At last, critical research issues on cloud service description languages are identified and analysed. The solution of these issues requires more research efforts on the standardization of cloud service specification, which will eventually enhance the development of cloud industry

How Should Business Informatics Integrate Service, Process, Work System, and Enterprise Orientations?

Current research related to the subject matter of business informatics reflects divergent orientations that are fundamentally about representing, analyzing, and designing services or processes or work systems or enterprises. After summarizing those four orientations and citing typical exemplars, this paper identifies a variety of paths toward greater integration between different orientations within business informatics. It identifies central topics for each orientation along with areas in which each orientation provides ideas that complement other orientations and reveal possible synergies. Both the approach for identifying potential synergies and the proposed synergies themselves could encourage greater integration within business informatics

BoSDL: An Approach to Describe the Business Logic of Software Services in Domain-Specific Terms

Modular SaaS platforms that can flexibly be configured with software services, microservices, and the advent of the API economy provide new opportunities to realize even highly customized solutions in the cloud. The success of such endeavors depends on the ability of consumers to discriminate between offered services and choose those best fulfilling the requirements, though. To facilitate the assessment of services against functional requirements, this article proposes the Business-Oriented Service Description Language (BoSDL). It consists of: (1) a meta-model with rules to describe the business logic, that is, the functionality of a software service from a business-oriented perspective; (2) a textual presentation format based on English natural language; (3) a graphical notation based on the UML. Findings from a controlled experiment indicate that, compared to the state of the art, the information provided with the BoSDL enhances the ability of consumers to judge if software services satisfy existing functional requirements