User guide

Glossary 262
any, are said to be at Tree Depth = 2, and similarly for subsequent generation below the immediate child
domains of the forest root. A forest may have more than one tree (that is, more than one root domain),
although only one of them is known as the forest root. Each root domain in a forest is said to be at Tree
Depth = 1. The schema fr numbering tree depth is the same for all trees in a forest. It is the same as for
the tree whose root is the forest root domain.