ref

This attribute holds labeledURI values referring to another LDAP server. The URI should be an LDAP URL. The URI should not specify scope, filter, or an attribute description list, and it should contain a non-empty DN.

Example: ldap://referral.example.com:1389/ou=Subscribers,dc=example,dc=com

Origin	RFC 3296
Usage	distributedOperation
Description	named reference - a labeledURI
OID	2.16.840.1.113730.3.1.34
Substring Matching Rule	caseIgnoreSubstringsMatch
Equality Matching Rule	caseExactMatch
Single Value	false: multiple values allowed
Names	ref
Ordering Matching Rule	caseIgnoreOrderingMatch
User Modification Allowed	true
Used By	referral
Schema File	00-core.ldif
Syntax	Directory String