A data exchange format is an agreement on … between two systems. … The data exchange format of Kleisli corresponds one-to-one … In fact, the data exchange format completely adopts … the value construction syntax is such that it … the corresponding value, as each value constructor is … a bag … Thus, by adopting the value construction syntax of … there is no need to define in advance … there is no fixed schema … [nor] type declaration … each object being exchanged carries its own description. … [p. 6] Kleisli's is probably the first self-describing exchange …
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