Architecting and designing : SOA : Services : Services and information
  
Services and information
Services use information, either by consuming, creating, changing, or deleting data. The Service definition makes use of the Data objects definition to show information participation in the execution of the Service.
The Service definition contains the Inputs/Outputs chapter, with fields where the following information is entered:
Inputs
Specify the Data Objects that the Service references for its operation.
Outputs
Specify the Data Objects that the Service provides in its operation.
See also
Services