Exam 1z0-434 topic 1 question 6 discussion

Consider the current values of BPEL variables InputVariable andOutputVariable:

Then consider the following BPEL activity Assign1:
<assign name="Assign1"> <!- - Line 1- ->
<copy> <!- - Line 2 - ->
<from variable ="InputVariable" <!- - Line 3 - -> part = "query_Input" <!- - Line 4 - -> query="/ns2: query_Input/ns2:Row_Id"/> <!- - Line 5 - ->
<to variable ="OutputVariable" <!- - Line 6 - -> part = "query_Output" <!- - Line 7 - -> query="/ns2: query_Outnput/ns2:RowId"/> <!- - Line 8 - ->
</copy> <!- - Line 9 - ->
</assign> <!- - Line 10 - ->
Which two changes allow Assign1 to work with the current values of InputVariable andOutputVariable?