LDAP-UX Client Services B.04.10 Administrator's Guide (edition 7)

Object Class Definition Requirements
To add the new schema to the LDAP directory server, each object class definition must meet the
following requirements:
• The object class definition contains a <oid> tag with one numeric id value which adheres
to RFC 2252 format specification.
• The object class definition has at least one <name> tag with the object class name. Each name
must adhere to RFC 2252 format specification.
• No other object classes in the schema definition file or on the LDAP directory server have
the same numeric id value.
• No other object classes in the schema definition file or on the LDAP directory server have
the same name value.
• The super-class(es) used by the object class must be defined.
• The attribute(s) used by the object classes must be defined.
• The inheritance hierarchy has no cycles (no circular dependencies exist in the super-class
and sub-class relationships).
• An ABSTRACT object class can specify only ABSTRACT object class(es) as its super-class(es).
• An AUXILIARY object class can specify ABSTRACT or AUXILIARY object class(es) as its
super-class(es).
• A STRUCTURAL object class can specify ABSTRACT or STRUCTURAL object class(es) as its
super-class(es).
Predefined Schema Definition Files
The following LDAP schema definition files are delivered with the LDAP-UX product:
• /etc/opt/ldapux/schema/rfc2256.xml
• /etc/opt/ldapux/schema/rfc2307.xml
• /etc/opt/ldapux/schema/rfc2307–bis.xml
• /etc/opt/ldapux/schema/rfc2926.xml
• /etc/opt/ldapux/schema/rfc3712.xml
These files are provided as examples to demonstrate how to define new LDAP schema definition
files to use with the ldapschema utility. Since these files define attribute types and object classes
that come pre-installed on most LDAP directory servers they are not intended for extending the
LDAP directory server schema. Instead, these files are provided for reference when creating the
new schema definition files to query and extend the LDAP directory server schema with the new
attribute type and object class definitions.
Schema Extension Utility 153