TSE ISO/IEC GUIDE 3:1999

TSE ISO/IEC GUIDE 3:1999: TSE ISO/IEC Guide 3:1999 is a guidance document on how to identify national standards that are equivalent to international standards. Rather than defining product requirements or test procedures, it focuses on the method used to express equivalence and the conditions under which that method may be used. In practical standardization work, this kind of guidance helps keep references between national and international publications clear and consistent.

How equivalence is identified

The core subject is the designation of a national standard as equivalent to an international one. In standards practice, equivalence is a relationship used to show close technical alignment in scope and intent, while still leaving room for differences in national presentation or adoption format. This Guide addresses two variants of the recommended identification method and helps distinguish how that relationship may be expressed in official standard references.

Where the Guide fits in standardization practice

The document deals with one of the cases covered in ISO/IEC Guide 21 and also gives hints for other methods. That means its role is methodological: it supports consistent bibliographic description, national adoption records, and cross-referencing between standards systems. It does not introduce technical performance limits or product-specific requirements; its value lies in clarifying how equivalence between standards should be presented and when the recommended identification approach is appropriate.

• It addresses identification of national standards equivalent to international standards.
• It recommends two alternative forms of the identification method.
• It explains the conditions under which use of the method is permitted.
• It relates to one of the cases covered in ISO/IEC Guide 21.
• It also offers hints for other identification methods.