<measure>.level(<hier>.top) for multiple branching hierarchy

Hi experts,

sales.level([loc].top)Returns the value for the measure sales for the position at the top of the location hierarchy and for the current position in all other hierarchies.

This is an example cited from RPAS configuration guide.

Questions:

1) does the expression always returns the same result even if LOC hierarchy is a multiple branching one?

2) suppose that LOC is multiple branching hierarchy, in any case do I need to concern which highest dimension it rolls up to?

It is appreciated for any response.

Best regards,

Phil