TS ISO 3166-3

TS ISO 3166-3 is the third part of the ISO 3166 series and focuses on the code structure used to represent formerly used country names. Its scope is tied to country names that were removed from earlier editions of ISO 3166-1, so the standard serves as a controlled reference for historical country designations rather than for current country coding.

Coding historical country names

In practical data management, country names are not always stable: political changes, territorial reorganisations, mergers, dissolutions, and renamings can all affect how a place is identified over time. A code system helps keep records consistent across databases, archives, catalogues, and documentation workflows. In this context, ISO 3166-3 deals with the representation of former names in a structured form, helping users distinguish historical references from active country identifiers.

Principles and maintenance arrangements

The standard is not only about listing codes; it also establishes principles and maintenance arrangements for keeping those codes organised and usable. That makes it relevant wherever older records must be matched, interpreted, or preserved with precision. In general technical terms, this kind of controlled vocabulary supports interoperability, indexing, and long-term record integrity when country names change over time.

• Part of ISO 3166 devoted to formerly used country names.
• Covers country names removed from earlier editions of ISO 3166-1.
• Provides principles and maintenance arrangements for the code set.
• Supports consistent handling of historical country references in information systems.