OntoLink (Ontology-Linker) is a knowledge integration tool that can be used to specify semantic and syntactic mappings/transformations between concepts defined in different ontologies/schemas. OntoLink was designed and developed in collaboration with Fujitsu Labs of America, College Park to be used in the Task Computing Environment. It is now available as an open source tool.
OntoLink is a general purpose tool to define mappings between ontology elements but it was primarily built to support web service composition and execution for DAML-S. The mappings defined between ontology elements can be wrapped inside translator services. These translator services can be used to transform the output of one service to a compatible format that another service can consume so that two previously incompatible services can be composed together. This is very useful to establish interoperability when the services describe their parameters using two different ontologies. For example, the screenshot below shows the definition of a mapping where a Name property of a Person concept defined in one ontology is the concatenation of FirstName and LastName properties which are defined in another ontology.
The other usage of OntoLink is for defining mappings between DAML ontologies or XML Schema elements. This feature is required to enable the execution of DAML-S web services using SOAP messages. The Grounding description of a DAML-S description should contain the XSLT transformation that will transform the DAML instances to XML Schema elements. OntoLink lets the user to define these mappings using the same interface. It also lets the user to generate whole DAML-S descriptions from WSDL descriptions. The transformations defined for parameters are saved inside the grounding part of this DAML-S file. See the documentation for more information.
The source/binaries can be obtained here. Upon unzipping the downloaded file, execute StartOntolink.bat to start the application.
See OntoLink help page to learn how to use the tool. The help file is also included in the download bundle.