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  Home : ITU-T : Publications : Recommendations : X Series : X.521
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X.521 : Information technology - Open Systems Interconnection - The Directory: Selected object classes  

Recommendation X.521

In force components
Number
 Title Status
X.521 (10/19)
  		Information technology - Open Systems Interconnection - The Directory: Selected object classes   In force
X.521 (2019) Amendment 1 (10/24)
  		Miscellaneous enhancements   In force
 
 
Superseded and Withdrawn components
Number
 Title Status
X.521 (11/88)
  		The Directory - Selected object classes   Superseded
X.521 (11/93)
  		Information technology - Open Systems Interconnection - The directory: Selected object classes   Superseded
X.521 (08/97)
  		Information technology - Open Systems Interconnection - The Directory: Selected object classes   Superseded
X.521 Amendment 1 (03/00)
  		Enhancements for the support of ITU-T Recommendation F.510, and for certificate extensions  
Never published, consolidated in ITU-T X.521 (02/2001). Only the electronic prepublished version is available on ITU Website 		Superseded
X.521 (1997) Technical Cor. 1 (02/01)
  		  Superseded
X.521 (02/01)
  		Information technology - Open Systems Interconnection - The Directory: Selected object classes   Superseded
X.521 (08/05)
  		Information technology - Open Systems Interconnection - The Directory: Selected object classes  
 		Superseded
X.521 (2005) Corrigendum 1 (04/12)
  		  Superseded
X.521 (11/08)
  		Information technology - Open Systems Interconnection - The Directory: Selected object classes   Superseded
X.521 (2008) Corrigendum 1 (04/12)
  		  Superseded
X.521 (10/12)
  		Information technology - Open Systems Interconnection - The Directory: Selected object classes   Superseded
X.521 (10/16)
  		Information technology - Open Systems Interconnection - The Directory: Selected object classes   Superseded

 

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