: By combining these aspects with specific letter codes, you create a "Reference Designation" (RDS) that tells you exactly what a part is and where it fits. For example, a motor might be designated by its function in a ventilation system rather than just being called "Motor #5." Hierarchical Structure
. The newer version expands on the "Object Interest" philosophy and is more compatible with modern BIM (Building Information Modeling) and international software standards. If you are starting a iec 61346-1 pdf
It is important to note that IEC 61346 was withdrawn and replaced by IEC 81346-1:2009 : By combining these aspects with specific letter