This paper describes work in progress to develop a stan-dard for interoperability ariiong high-petforniance scien-tific coniponents. This research sterns front growing recog-nition that the scientific coniniunity needs to better man-age the coniplexity of ntultidisciplinuiy simulations and bet-ter address scalable petforniance issues on parallel and distributed architectures. Driving forces are the need for fast connections among components that perform numeri-cally intensive work and for parallel collective interactions among cornponetits that use multiple processes or threads. This paper focuses on the areas we believe are niost cru-cial in this context, naiizely, an intetface definition language that supports scientipc abstractions for specifying coriipo-nent interfaces and a ports connection model for specifiing component interactions.
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