Design and implementation of SATOR: a Web service aggregator

The aggregation methodology we propose in this paper automatically

generates the service contract of a composite service from a set of con-

tracts to be aggregated together with a data-flow mapping linking service

parameters. Service contracts consist of (WSDL) signature, (OWL) on-

tology information, and (YAWL) behaviour specification.

The aggregation process generates the workflow of the composite from

the initial workflows by suitably adding control-flow constraints among

their tasks due to data-flow dependencies among task parameters.

After describing the whole methodology, we will also give an insight

on our proof-of-concept Java prototype implementation of the aggregation

process.