| ...Nonetheless
it is obvious that works like those of Berio and Stockhausen are 'open'
in a far more tangible sense. In primitive terms we can say that they
are quite literally 'unfinished' : the author seems to hand them on to
the performer more or less like the components of a construction kit.
He seems to be unconcerned about the manner of their eventual deployment.
The work remains inexhaustible insofar at it is open, because in it an ordered world based on universally achnowleded laws is being replaced by a world based on ambiguity, both in the negative sense that directional centers are missing and also in a positive sense, because values and dogma are constantly being placed in question. Eco, Umberto, "The poetics of the open work",
in 20th Century Studies 12, 1974 , S. 6-26
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