Recently exchange formats have gained lots of attention. Multiple tools need to interact and/or work on the same software system. Especially there is a need to reuse parser technology. Within the FAMOOS project we have developed a model for representing object-oriented software systems at the program entity level. The model has been designed for language independence, extensibility and information exchange. For the actual exchange of data we are currently moving to use XMI, a standard for modelbased information exchange.