Schemas are definitions that describe what types of information can be stored as entries in a server's directory.
For a directory server to support LDAP naming clients, schemas defined in this chapter must be configured in the server unless schema is mapped using the schema mapping feature of the clients.
Several required LDAP schemas are defined by IETF: the RFC 2307 Network Information Service schema and RFC 2307bis, and a Configuration Profile Schema for Lightweight Directory Access Protocol (LDAP)-Based Agents (RFC 4876), and the LDAP Schema for Printer Services. To support the NIS, the definition of these schemas must be added to the directory server. The various RFCs can be accessed on the IETF web site at http://www.ietf.org.