8. The method of claim 1 , wherein a third parameter included in a third document associated with the current workflow matches the first parameter, and further comprising modifying a value associated with a third node in the parameter tree that corresponds to the third parameter based on the input.
8. The method of claim 1 , wherein a third parameter included in a third document associated with the current workflow matches the first parameter, and further comprising modifying a value associated with a third node in the parameter tree that corresponds to the third parameter based on the input. 9. The method of claim 8 , wherein the first node and the third node are bound to a first variable, and the method comprising determining that the first variable is modified; in response, modifying the value associated with the first node and the value associated with the third node accordingly.