5.3 Application Scenario and Discussion

	The presented data integration technique and the mediated architecture are complemented by an incremental,
	evolutionary process model.

	In the proposed architecture, the unified data model (over-arching schema) is maintained manually. The schema
	for large enterprise integration solutions might consist of a large number of data aspects.

	From the development point of view, it is only reasonable to deliver the data integration services on a phased
	basis such as one data aspect for one release cycle.

	A mediator consists of the following components: the individual provided Web services; a WS-BPEL workflow;
	and one or more service connectors.

	The focus of the investigation is not on the automatic composition of Web services, rather on how the data
	output from multiple Web services can be automatically integrated according to a global data model and sent
	back to users.

	During the development phase, the mappings between the global model and the local models will be expressed
	at the abstract model level, for instance in the widely used MOF (meta object facility) framework for modeling
	language definition. The inputs are the source XML schema definitions and the transformation rules.

The output is an XSLT transformation file.