Java OWL-S API

OWL-S API provides a Java API for programmatic access to read, execute and write OWL-S (formerly known as DAML-S) service descriptions. The API supports to read different versions of OWL-S (OWL-S 1.0, OWL-S 0.9, DAML-S 0.7) descriptions. The API provides an ExecutionEngine that can invoke AtomicProcesses that has WSDL or UPnP groundings, and CompositeProcecesses that uses control constructs Sequence, Unordered, and Split. Executing processes that relies on conditionals such as If-Then-else and RepeatUntil is not supported in the default implementation. But this implementation can be extended to handle these constructs if the application that uses the OWL-S descriptions has a custom syntax and evaluation procedure for the conditions."