Abstract. The Semantic Web will allow software agents to understand and reason about data provided by Web applications. Unfortunately, formal ontologies, needed to express data semantics, are often not readily available. However, common data schemas can help to create ontologies. We propose mappings from XML Schema to OWL as well as XML to RDF and show how web engineering can benefit from the gained expressiveness as well as the use of inference services.

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Service-oriented computing is meant to support loose relationships between organisations: Collaboration procedures on the application-level translate to interaction processes via Web Services. Service composition deals with the specification and enforcement of such processes. Its main focus is on service orchestration where workflow management is utilised for proactive coordination. In such an approach, coordination process and interaction logic are usually captured in the same workflow -which leads to deficiencies in recognising the possible impact of operational coordination on the interaction logic. In this paper, we claim that the choice of coordination alternatives impacts the quality of the composed service and has to be customised to each specific service case. As a consequence, we outline a solution that is based on service interaction patterns where the paradigms of patterns and idioms are applied to interaction procedures and orchestration processes. This allows studying a) reusable interaction patterns typical for service relationships and b) for each pattern a range of possible coordination idioms. Finally, we sketch a technique that refines the service logic based on analysis of its interaction patterns and utilisation of suitable coordination idioms selected by rules in terms of changing service context.

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Modern business strategies consider Web-based outsourcing of microjobs to the masses. Respective business activities are however difficult to manage. Traditional approaches of covering human tasks in business processes build on assumptions of limited process scale and closed organizational models that are not valid in crowdsourcing scenarios. Web services have been proposed as a means to represent human tasks that allow leveraging interaction, brokerage and composition capabilities of SOC for human interaction management. In this paper we argue that crowdsourcing requires considering qualitative constraints and sketch a platform for managing the quality of human-based eServices.