DE.HSIBLING
Returns the sibling of an element on the same XMLA level as a specified
element and a specified number of elements away from it. You specify the XMLA level as a value
from -1 to 127. An element with an XMLA level of 0 is a root element. Its children are at XMLA
level 1, 2, and so on.
The special XMLA level -1 is used if to display descendants of other root elements at the same XMLA level.
Syntax
DE.HSIBLING(Dimension, Element, XMLA Level,
Offset)