<sect1 id="machine-constraint">
<title>Constraints</title>
<para>
- As well as definining the connections the machine interface
- also provides constraints definining the operations that
+ As well as defining the connections the machine interface
+ also provides constraints defining the operations that
clients are allowed to perform and the parameters that may be
set. This is required since generally regulator devices will
offer more flexibility than it is safe to use on a given