Axis: descendant-or-self
Element
Node-set
AAA id = a1
a1 b1 b2
BBB id = b1
b1
BBB id = b2
b2
AAA id = a2
a2 b3 b4 c1 c2 b5 c3
BBB id = b3
b3
BBB id = b4
b4
CCC id = c1
c1 c2
CCC id = c2
c2
BBB id = b5
b5 c3
CCC id = c3
c3