How does "Limit search to siblings " work?

[MrAnalogy]

I think this works by searching only the siblings (and children?) where the Search item is located, correct?

Main
. Branch1
... Query1
... Item2
... item2

. Branch2

Therefore, Query1 would search only item1, item2, NOT Branch2, right?

[quant]

right

siblings + children (recursively)