Tree - Sibling

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Sibling is a tree relationship term. They are child (node|members) of the same immediate parent, at the same generation (level).

An element A is called a sibling of an element B, if and only if B and A share the same parent element.

• Element A is a preceding sibling if it comes before B in the tree.
• Element B is a following sibling if it comes after A in the tree.

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