  Context-Oriented Programming languages provide us with primitive constructs
to adapt program behaviour depending on the evolution of their operational
environment, namely the context. In previous work we proposed ML_CoDa, a
context-oriented language with two-components: a declarative constituent for
programming the context and a functional one for computing. This paper
describes an extension of ML_CoDa to deal with adaptation to unpredictable
context changes notified by asynchronous events.
