Creating a simple LDAP application

Object-oriented look at LDAP entries

A lot of similarities with OO programming languages, but some big differences, too.

An LDAP entry corresponds with an object.
Whereas object are usually instances of a single class, LDAP entries can "implement" multiple objectClasses.
objectClasses can inherit zero, one or many objectClasses, just like programming classes.
objectClasses have a root class, known as top; many object oriented programming languages have a root class, e.g. named Object.
objectClasses are either STRUCTURAL or AUXILIARY; entries can only implement one STRUCTURAL objectClass.
The objectClasses of an entry can be changed at will; you only need to take care that the entry has all the MUST attribute types, and no attribute types outside of the ones that are MUST or MAY.

Note that e.g. OpenLDAP doesn't implement this.
Attributes of an entry closely match attributes of objects in programming languages; however, LDAP attributes may have multiple values.