  It is outlined the possibility to extend the quantum formalism in relation to
the requirements of the general systems theory. It can be done by using a
quantum semantics arising from the deep logical structure of quantum theory. It
is so possible taking into account the logical openness relationship between
observer and system. We are going to show how considering the truth-values of
quantum propositions within the context of the fuzzy sets is here more useful
for systemics . In conclusion we propose an example of formal quantum
coherence.
