This command replaces the current keys/objects in a frame based on the new keys provided.
In the following example the frame name is "f1", the collection is "examples.ds". The first example is reframing an existing frame using existing keys coming from standard input, the second example performs the same thing but is taking a filename to retrieve the list of keys.
cat f1-updated.keys | dataset reframe example.ds f1
dataset reframe example.ds f1 f1-updated.keys