IEC 81346-2:2009

FOREWORD
INTRODUCTION
  0.1 General
  0.2 Basic requirements for this standard
1 Scope
2 Normative references
3 Terms and definitions
4 Classification principles
  4.1 General
  4.2 Assigning objects to classes
5 Classes of objects
  5.1 Classes of objects according to intended purpose or task
  5.2 Subclasses of objects according to intended purpose or
      task
  5.3 Classes of objects according to infrastructure
Annex A (informative) Object-classes related to a generic
        process
Annex B (informative) Object-classes related to objects in
        a generic infrastructure

IEC 81346-2:2009, published jointly by IEC and ISO defines classes and subclasses of objects based on a purpose- or task-related view of the objects, together with their associated letter codes to be used in reference designations. The classification is applicable for objects in all technical areas, e.g. electrical, mechanical and civil engineering as well as all branches of industry, e.g. energy, chemical industry, building technology, shipbuilding and marine technology, and can be used by all technical disciplines in any design process. It has the status of a horizontal standard in accordance with IEC Guide 108.