Comparisons between CORBA IDL & COM/DCOM MIDL: Interfaces for Distributed Computing

The adoption of distributed computing has brought with it the problem of interoperability. Today, program developers need to interoperate over large and complex heterogeneous networks. Dealing with the interoperability problems that these networks can provide leads to increasing the complexity of the overall system. This complexity can be signiicantly reduced through the introduction of an interface deenition language which adds an abstraction layer capable of handling many of the underlying problems. Two major interface deenition languages being used today include CORBA's Interface Deeni-tion Language (IDL) and Microsoft's Interface Deenition Language (MIDL) associated with COM/DCOM. This paper provides an overview of both interface deenition languages and a comparison between them based on our experiences developing distributed systems using both. We draw some conclusions about the strengths and weaknesses of both.