Tree - Descendant

Data System Architecture

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An element A is called a descendant of an element B, if either:

  • (1) A is a child of B,
  • or (2) A is the child of some element C that is a descendant of B.

Descendants are elements (members) in branches below a parent.

  • A child is a direct descendant
  • A grand-child, a child of a child is also a descendant





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An asymmetric relation is a type of binary relation that requiers: antisymmetry (ie if a is related to b, b is not related to a) and irreflexivity (ie an element cannot be related to itself) irreflexivity...



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