X.500 Standard status
X.509 Related activities
How to be involved
Tutorial section 1
Tutorial section 2
Other PKI organizations
This page provides information about the X.500 Directory standardization organization and procedures.
The X.500 standardization is done in cooperation between ISO/IEC JTC1/SC6/WG8 and ITU-T Study Group 17, Question 11 (ITU-T Q.11/17). The intention is to provide a common text for the two organisations .
The ISO/IEC JTC1 and ITU-T have produced a Guide to ITU-T and ISO/IEC JTC1 cooperation on how the common text shall be developed and presented.
The chairing of the X.500 standardization work is shared between the ISO/IEC JTC1/SC6/WG8 Convenor Mr. Jean-Paul Lemaire and The ITU-T Q.11/17 Rapporteur Mr. Erik Andersen.
Extension to X.500 may be suggested either by members of ISO/IEC JTC1/SC6 or by ITU-T members. To a large degree, the ISO/IEC JTC1 procedures are used for progressing extensions. To initiate new work, a New Work Item has to be approved within ISO/IEC JTC1/SC6. A new Work Item proposal with justification, initial draft, etc. is sent to the ISO/IEC JTC1/SC6 secretariat for ballot among its members. An editor for the new text also has to be identified. If approved, the work may commence. Within ITU-T, the work is included in the ITU-T Q.11/17 action plan and approved by the following ITU-T Study Group 17 Plenary Meeting.
The work is progressed as a working document by stepwise improvement based on contributions at meetings or on the mailing list. When achieving a level of stability, it issued as Proposed Draft Amendment (PDAM) and forwarded to the ISO/IEC JTC1/SC6 secretariat for a three month ballot. Ballot comments are received and a ballot resolution meeting is conducted at the next meeting opportunity. The resolution of the ballot comments results in a revised document. Depending on the number of changes, the document can then forwarded for a new PDAM ballot, or the document can get to next state called Final Proposed Draft Amendment (FPDAM).
The FPDAM document goes out for a four month ballot within the ISO/IEC JTC1/SC6. Ballot comments are received and subsequently resolved at an editing meeting. After this, it can out for another FPDAM ballot, or the document may be considered complete from a technical standpoint.
Having achieved this technical level, the document may go out as a Final DRAFT Amendment for a final approval allowing only a YES or NO vote and possibly some minor editorial comment. However, within X.500 we have the tradition to integrate the text to provide a new edition of X.500. This new edition is then sent out for a Final Draft International Standard (FDIS) vote. The integration of the text is done by the Project Editors. Currently, Mr. Hoyt Kesterson is the Project Editor for X.509, while Mr. Erik Andersen is the Project Editor of the remaining nine parts.
At the ITU-T side, the FDIS document is approved at an ITU-T Study Group 17 plenary meeting and posted for a four weeks review following the procedures set out by the Alternative Approval Process (AAP).
After final ITU-T approval, possibly taking some comments into account, the documents are submitted to ISO Central Secretariat for a Final Draft International (FDIS) two months ballot. This ballot is primarily a Yes/No ballot with the possibility to submit editorial comments.
After final approval, the document is ready for the final touch by the ITU-T editing team working together with the Project Editors to get a clean text in accordance with all the editing rules set out for common text.