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Assembling a large system from its component elements is not a simple task. An adequate notation for specifying this task must reflect the system structure, accommodate many configurations of the system and many versions as it develops, and be a suitable input to the many tools that support software development. The language described here applies the ideas of λ-abstraction, hierarchical naming and type-checking to this problem. Some preliminary experience with its use is also given.
Lampson et al. (Sat,) studied this question.