LDAP URLs identify the Red Hat Directory Server instance, similarly to the way site URLs identify a specific website or web page. There are three common times when the LDAP URL of the Directory Server instance is used:
The LDAP URL is used to identif the specific Directory Server instance when the Directory Server is accessed using a web-based client.
LDAP URLs are used to configure Directory Server referrals.
LDAP URLs are used to configure access control instructions.
The LDAP URL format is described in RFC 4516, which is available at http://www.ietf.org/rfc/rfc4516.txt.