Logical Hierarchy and the Directory Information Tree

In a three-tiered directory hierarchy, a Directory Information Tree (DIT) does not look exactly like the logical view shown in Figure A–1. Organizations are implemented in the DIT in a somewhat different hierarchy.

For example, in a DIT, full domains must reside directly under the root suffix. Therefore, domain nodes are added under the root suffix to store LDAP information for shared domains (used by shared organizations) and for full organizations (which have their own domains).