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How XML web services integrate two legacy distributed system

How can XML web services integrate two legacy distributed systems, one based on Corba and one based on Java RMI?

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To integrate legacy systems into a bigger platform that interoperates each other, we use CORBA as an “extention” scheme, i.e., corba or web services connect legacy systems to one other as long as everyone conform to standard.

Depending on how the legacy works, we still have to use  uthor scraping or object mapping or similar thicks to make the legacy work with a CORBA vendor product, or WS vendor product.

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