SADI Semantic Web Services - ‚cause you can't always GET what you want!

SADI-semantic automated discovery and integration- is a set of standards-compliant semantic Web service design patterns that exploit the relatively straightforward interfaces exposed by most bioinformatics services to simplify and partially automate service design and deployment. The SADI design explicitly exposes an important service feature -the semantic relationship between input and output data. SADI services consume and produce instances of OWL classes, where the service's function is to add properties onto the input class until it fulfills the class-membership requirements of the output class. Indexing services based on the properties they add enables discovery of Services that generate the biological features of interest relative to a piece of in-hand data. We show that this design pattern can be used to create a client application with strikingly rich semantic behaviors, such as automated discovery of distributed data resources and the automated orchestration of chains of Web services into complex workflows.