Publications - Standards

ITU Recommendations are available direct from ITU.

The Society also has permission to distribute a version of the standards free to members (click here).

ITU-T is now also offering PDF versions of various standards for free download. However, these PDF versions of the Specification and Description Language/Message Sequence Chart standards do not include the syntax hyperlinks that can be found in the Microsoft Word files on the SDL Forum Site.

SDL Forum Society Members can usually download the most up to date versions, and also can participate in the discussion on the evolution of ITU System Design Languages and download documents under discussion. See the members download area (username and password needed). In particular, the members versions of Z.100 and Z.120 contain hyperlinks and are available in MSWord format as well as PDF. The members area also includes Z.106 (which defines the textual alternative to graphical parts of the Z.100 language used for interchange of models between tools) and Z.121 (the data binding for the Z.120 language to the Z.100 language).

ITU-T Recommendations are available in hard-copy format and (for most of them) on CD-ROM.

For more information, please contact Sales Service:

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Last update: 17 Nov 2009 17:43 -0000