[rules-users] Setting a Flow Variable from a Rule

How do you set a flow variable (not global) from inside a rule so it is available for nodes that follow the rule execution? I cannot seem to find this in the doc. Previously I had a Person() fact that was also passed into the flow as a variable, when I modified the fact Person() object it was reflected in the flow variable, but the latest snapshot seems to have broken this so I am looking for alternatives. Thanks, Todd