Andreas Billig

Semantic matching based on enterprise ontologies

Semantic Web technologies have in recent years started to also find their way into the world of commercial enterprises. Enterprise ontologies can be used as a basis for determining the relevance of information with respect to the enterprise. The interests of individuals can be expressed by means of the enterprise ontology. The main contribution of our approach is the integration of point set distance measures with a modified semantic distance measure for pair-wise concept distance calculation. Our combined measure can be used to determine the intra-ontological distance between sub-ontologies.

Ontology-based artefact management in automotive electronics

The current paper presents work in progress in integrated management of artefacts inautomotive electronics with a focus on requirements. A case study on industrial requirements management was performed in a Swedish automotive supplier of software-intensive systems. Based on this case study, a frame concept for integrated model management is proposed. One core element in implementing the frame concept is an ontology-based domain repository. Concepts, architecture and realization of a domain-repository are introduced. The domain repository is based on RDF, RDFS and TRIPLE and includes extensions supporting navigation in the artefact net and derivation of new knowledge: modlets, actlets and spot views.

Mecomp.net - organizational, sociological and technological aspects of a community network in the field of education and employment

Global competition and short innovation cycles in information technology (IT) and multi-media industries (MM) lead to rapidly changing requirements with respect to education and qualification of human resources. Traditional vocational training and education offerings are no longer sufficient in this situation and have to be supplemented with short-term, need-oriented and work-process oriented offers. In mecomp.net all actors in the field of media and IT-competence have been considered as community of interest, self-regulating the evolution of qualification offers based on current developments in the market and employment situation. Interaction, communication and self-regulation within this community is supported by an Internet-based Web-Portal, providing evolution mechanisms and matchmaking between suppliers and seekers of jobs and qualification measures. This paper introduces the basic organizational and sociological aspects of mecomp.net, outlines the main concepts of the Web-Portal (wwwmecomp.net) and implementation, and summarizes the lessons learned.

Towards ontology-based requirements management in automotive electronics

Abstract The paper presents work in progress in integrated management of artifacts in automotive electronics with focus on requirements. A case study on industrial requirements management was performed in a Swedish automotive supplier of software-intensive systems. Based on this case study, a frame concept for integrated model management is proposed. One core element in implementing this frame concept is an ontology-based domain repository. Concepts, architecture and realization of a domain-repository are introduced. The domain repository is based on RDF, RDFS and TRIPLE and includes extensions supporting navigation in the artifact net and derivation of new knowledge: Modlets, Actlets and Spot Views.

Evolution of Web computing systems: experiences from Web-portal projects

Portals form the single access point to relevant information and applications for a specific target group. Like all other software systems, portals will get less useful over time if they do not evolve according to changing user requirements. This paper is based on results of approx. 10 projects in Web-Portal research and development between 1997 and 2004. Experience with respect to evolution of the portal platform BaSeWeP is presented from different viewpoints: (1) functional and architectural evolution of the platform from a meta-information system to a knowledge portal, (2) the induced content evolution, and (3) the overall evolution process.

An Open, Transparent, Community-based Development Process for Interoperability Specifications

The software development process utilized to implement enterprise systems using a component architecture in a distributed environment is well understood. The service oriented architecture enables the joint development of global and enterprise-wide solutions by several developers following enterprise-wide IT-strategies as coordinated by the customer. However, the necessary level of collaboration between parties from the private or public sector requires well-defined interoperability specifications. The existing standardization processes are usually too complex and inflexible for widely available interoperability specifications in rather specialized application domains. The Semantic Interoperability Centre Europe (SEMIC.EU) defines an open clearing process to enable the collaborative development of interoperability specifications in order to exchange data especially between public administrations from the Member States of the European Community. Based on this scenario the publishing process and tools required for interoperability specifications supporting the data exchange in service- or web-oriented architectures are compared with the traditional software development process.

A TRIPLE-Oriented Approach for Integrating Higher-Order Rules and External Contexts

In recent years, many researchers in the area of reasoning have focussed on the adoption of rule languages for the Semantic Web that led to remarkable approaches offering various functionality. On one hand, this included language elements of the rule part itself like contexts, higher-orderness, and non-monotonic negation. On the other hand, the proper integration with ontology languages like RDF and OWL had to consider language-specific properties like disjunctivity as well as the demand for using existing external components. The paper proposes a Triple -oriented hybrid language that integrates the mentioned language elements of both aspects following the expressiveness of locally stratified datalog. It introduces fixpoint semantics as well as pragmatic extensions for defining transformations between fact bases. A partial implementation is based on stratified, semi-naive evaluation, and static filtering.