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Front cover - IBM Redbooks

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– RFC-2252 LDAPv3: Attribute Syntax Definitions<br />

– RFC-2253 LDAPv3: UTF-8 String Representation of Distinguished Names<br />

– RFC-2254 String Representation of LDAP Search Filters<br />

– RFC-2255 LDAP URL Format<br />

– RFC-2849 The LDAP Data Interchange Format (LDIF)<br />

When a directory is distributed, the information stored in the directory can be<br />

partitioned or replicated (or a combination of both). When information is<br />

partitioned, each directory server stores a unique and non-overlapping subset of<br />

the information. That is, each directory entry is stored by one and only one<br />

server. The technique to partition the directory is to use LDAP referrals. LDAP<br />

referrals allow the users to refer LDAP requests to either the same or different<br />

name spaces stored in a different (or same) server. When information is<br />

replicated, the same directory entry is stored by more than one server. In a<br />

distributed directory, some information may be partitioned, and some information<br />

may be replicated.<br />

Detailed information on LDAP directory concepts and implementations can be<br />

found in the following <strong>IBM</strong> publications:<br />

► <strong>IBM</strong> Redbook Understanding LDAP, SG24-4986<br />

► <strong>IBM</strong> Redbook LDAP Implementation Cookbook, SG24-5110<br />

► <strong>IBM</strong> Redbook Using LDAP for Directory Integration: A Look at <strong>IBM</strong><br />

SecureWay Directory, Active Directory, and Domino, SG24-6163<br />

► <strong>IBM</strong> Redbook Implementation and Practical Use of LDAP on the <strong>IBM</strong> e-server<br />

iSeries Server, SG24-6193<br />

► <strong>IBM</strong> Redpaper, LDAP Directory Services in <strong>IBM</strong> WebSphere Everyplace<br />

Access V4.1.1, REDP3603<br />

8.2 Multiple directories<br />

Applications deployed by organizations typically have required or provided their<br />

own dedicated user registration directories. The result is a variety of user<br />

directories and pieces of information about those users deployed throughout the<br />

organization, each with their own unique properties and different sources of data.<br />

Data sources are typically represented by a wide variety of systems, repositories,<br />

and structures, such as:<br />

► LDAP-capable directories (examples: Domino directory, <strong>IBM</strong> Directory<br />

Server, Microsoft Active Directory, Netscape/iPlanet/SunONE Directory<br />

Server, Novell NDS)<br />

Chapter 8. Directory strategies 311

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