</u>&rdquo;</em> semantic. In the Window API, events
fall into windows (as defined by the window
<a href="//nightlies.apache.org/flink/flink-docs-release-1.11/dev/stream/operators/windows.html#window-assigners">assigners</a>),
but they cannot themselves individually control the creation and
evaluation of windows*. As described above, our goal for the fraud
detection engine is to achieve immediate evaluation of the previous
relevant data points as soon as the new event is received. This raises
the question o