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All NISO standards are protected by copyright. NISO standards can be downloaded and reproduced for noncommercial purposes only. NISO standards cannot be translated, modified, redistributed, sold or repackaged in any form without the prior permission of NISO. Inquiries regarding commercial reproduction and translation should be directed to: nisohq@niso.org

All NISO standards undergo a review and maintenance cycle. If a standard does not require revision it is Reaffirmed. For example, "R2001" following Z39.2 indicates that Z39.2 was Reaffirmed in 2001. When a standard is revised it is balloted and approved by the NISO Members and the approval year is added to the designation. For example, ANSI/NISO Z39.7-2004 was last approved in 2004.

Related international standards are noted. ISO standards can be purchased in hardcopy or electronic form from Techstreet.