IEC 61346-1:1996

1 Scope
2 Normative references
3 Definitions
4 Structuring principles
4.1 General
4.2 Function-oriented structure
4.3 Product-oriented structure
4.4 Location-oriented structure
4.5 Object description and object occurrence in forming
     structures
5 Construction of reference designation
5.1 General
5.2 Format of reference designations
5.2.1 Single-level reference designation
5.2.2 Letter codes
5.2.3 Multi-level reference designation
5.2.4 Examples of structures and reference designations
5.3 Additional aspects of the same type
5.4 Identifying objects using different aspects
5.5 Reference designation set
5.6 Reference designation group
6 Location designation
Annexes
A Basic requirements and required properties of the
     reference designation system
B Examples of transitions from one aspect to another aspect
C Example of transition from one aspect to another aspect
     where the latter aspect has independent representations
D Example of reference designations within a system
E Letter codes of IEC 750
F Differences and similarities between the designation
     system defined in this standard, IEC 750, ISO 3511 and
     ISO/DIS 1219-2
G Bibliography

Establishes general principles for describing the structure of information about systems and of systems themselves. These principles are general and are intended to be applicable to all technical areas. It has the status of a horizontal standard in accordance with IEC Guide 108.