Use Task Flow Parameter as value to View query?

I'm not sure if I have all the terminology exactly correct, but basically I have a task flow that allows the user to edit data in a table. I want to open that task flow, pass a parameter from another task flow, and use that parameter to determine the row which I want to edit. A fairly typical use case I would imagine.
I can get the calling task flow to call the other task flow, but I cannot seem to determine what to set the value of the parameter in the called task flow to so that it executes the query and populates the page with the data from the row specified by that parameter.
What is the best practice for this type of use case?

duplicate: Re: Task flow parameter not available to set method call parameter

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