You would be MUCH better served visiting Wikipedia, Michael Donnelly's Introduction to LDAP, and Michael DOnnelly's Designing an LDAP Directory Tree which do a MUCH better job introducing and explaining the basics of LDAP. I consider it required reading. Go read each of those links to get a better foundation.
A very basic "briefest of brief" LDAP primer.
My documentation below -- Presented mostly for my own benefit. "To teach something one must first have understanding." My notes below reveal my grasp on the subject matter at hand. I had a difficult time at learning LDAP. Perhaps it will help others if I share the way that I came to an understanding of LDAP
Creating your LDAP tree
Designing your LDAP tree.
/widgets-data/atlanta/sales/spreadsheet-4-jim.odt
but an ldap entry for an entity would be start at the lowest entry and work its way to the root of the LDAP tree as in
"dn=jim,ou=sales,ou=atlanta,dc=widgets,dc=com"
For instance, Widgets International has Sales and Accounting offices in Atlanta, Paris and Rome. They plan on expanding to New York, Avignon, and Napoli. They have a variety of naming structures which may include a geographical approach such as:
{insert additional notes here about designing a tree to span geographical locations or locations based on keeping data local to the users.}