A string of characters used to uniquely identify a thing within a given context.

recommends using custom datatypes with this property to identify the notation, but this ontology discourages such usage: Custom datatypes are generally not compatible with Owl and cannot easily be reasoned about. It is better to instead use a more specific property, or a qualified relation, when typing the notation is important.

If two Concepts have the same notation within a single Concept Scheme, it is assumed that they are in fact the same individual.