is it possible in graphical mapping

dear expert

i would like to map element of header level to element under node(0.. unbounded) .

Source

==================

nodecountvalue 1, string

sitem 0.. unbounded

A1 1, string

A2 1, string

sitem 0.. unbounded

A1 1, string

A2 1, string

Target

==================

item 0.. unbounded

rowcount 1, string

A1 1, string

A2 1, string

nodecountvalue = 45 -> rowcount element under item(0, unbounded)

sitem[] -> item[]

if sitem has one row, it does work , but if sitem has more one row, it does not work.

is it possible in graphical mapping ?

if not, any other way?