ITU Sectors
Newsroom
Events
Publications
Statistics
About ITU
 
Office of the Secretary General
Office of the Secretary General
Office of the Secretary General
Radiocommunication (ITU-R)
Radiocommunication (ITU-R)
Radiocommunication (ITU-R)
Standardization (ITU-T)
Standardization (ITU-T)
Standardization (ITU-T)
Development (ITU-D)
Development (ITU-D)
Development (ITU-D)
ITU TELECOM
ITU TELECOM
ITU TELECOM
 
Calendar of Events
Calendar of Events
Calendar of Events
Today's Meetings 
Today's Meetings 
Today's Meetings 
Internet Webcast Service 
Internet Webcast Service 
Internet Webcast Service 
Search 
Search 
Search 
 
All Sectors
All Sectors
All Sectors
ITU-R
ITU-R
ITU-R
ITU-T
ITU-T
ITU-T
ITU-D
ITU-D
ITU-D
General Secretariat
General Secretariat
General Secretariat
 
ITU Publications 
ITU Publications 
ITU Publications 
Publications by Sector
Publications by Sector
Publications by Sector
 
General Secretariat and ITU Telecom
General Secretariat and ITU Telecom
General Secretariat and ITU Telecom
Radiocommunication (ITU-R)
Radiocommunication (ITU-R)
Radiocommunication (ITU-R)
Standardization (ITU-T)
Standardization (ITU-T)
Standardization (ITU-T)
Development (ITU-D)
Development (ITU-D)
Development (ITU-D)
 
International Telecommunication Union   ITU
Français  Español
 
Site map Contact us Print version
  Home : ITU-T : Publications : Recommendations : X Series : X.501
Recently posted -  Search Recommendations
   
X.501 : Information technology - Open Systems Interconnection - The Directory: Models  

Recommendation X.501

In force components
Number
Title Status
X.501 (10/19)
 
Information technology - Open Systems Interconnection - The Directory: Models   In force
X.501 (2019) Amendment 2 (10/24)
 
Miscellaneous enhancements   In force
X.501 (2019) Amendment 1 (10/21)
 
Information Technology - Open systems Interconnection - The Directory - Models - Amendment 1: Miscellaneous enhancements   In force
 
 
Superseded and Withdrawn components
Number
Title Status
X.501 (11/88)
 
The Directory - Models   Superseded
X.501 (11/93)
 
Information technology - Open Systems Interconnection - The Directory: Models   Superseded
X.501 (08/97)
 
Information technology - Open Systems Interconnection - The Directory: Models   Superseded
X.501 (1997) Technical Cor. 1 (03/00)
 
  Superseded
X.501 (1997) Amendment 1 (03/00)
 
Enhancements for the support of ITU-T Recommendation F.510 and mapping of directory protocols onto TCP/IP  
Never published, consolidated in ITU-T X.501 (02/2001). Only the electronic prepublished version is available on ITU Website
Superseded
X.501 (1997) Technical Cor. 2 (02/01)
 
  Superseded
X.501 (1997) Corrigendum 3 (05/05)
 
  Superseded
X.501 (02/01)
 
Information technology - Open Systems Interconnection - The Directory: Models   Superseded
X.501 (2001) Corrigendum 1 (05/05)
 
 
Superseded
X.501 (2001) Corrigendum 2 (11/05)
 
 
Superseded
X.501 (2001) Corrigendum 3 (05/08)
 
  Superseded
X.501 (08/05)
 
Information technology - Open Systems Interconnection - The Directory: Models   Superseded
X.501 (2005) Erratum 1 (08/06)
 
 
Applies to English version only
Superseded
X.501 (2005) Corrigendum 1 (05/08)
 
  Superseded
X.501 (2005) Corrigendum 2 (11/08)
 
  Superseded
X.501 (2005) Corrigendum 3 (02/11)
 
  Superseded
X.501 (2005) Corrigendum 4 (04/12)
 
  Superseded
X.501 (11/08)
 
Information technology - Open Systems Interconnection - The Directory: Models   Superseded
X.501 (2008) Corrigendum 1 (02/11)
 
  Superseded
X.501 (2008) Corrigendum 2 (04/12)
 
  Superseded
X.501 (2008) Corrigendum 3 (10/12)
 
  Superseded
X.501 (10/12)
 
Information technology - Open Systems Interconnection - The Directory: Models   Superseded
X.501 (10/16)
 
Information technology - Open Systems Interconnection - The Directory: Models   Superseded

 

Top -  Feedback -  Contact us -  Copyright © ITU 2008 All Rights Reserved
Contact for this page :  ITU-T Publications
Updated : 2025-03-21