Each object in the system is identified by a collection of tagnames.

All tagnames are optional. The more you use them the more powerfull the model and the more structure you need

These are

The Page Tag

This is the tagname that as it appears for each symbol on a diagram

The Object Tag

See Object Tags

The Instance Tag

See also RealTags

An S88 oriented structure might be

Area.Unit.Equipment Module.Control Module.

Page Tags do not have to be unique even on one diagram.

Object Tag have to be unique, Globally, so one object tag can only exist in one Class.

See also Tagging and Numbering