🔢Code Values

NEW

Also known as: Reference Codes, Code Lists, Enumeration Values

Standardized, governed value sets used to encode categories or states for attributes to ensure consistency and validation.

DESCRIPTION

Code values constrain attributes to predefined lists, improving data quality, interoperability, and analytics. Examples include country codes (ISO 3166) and currency codes (ISO 4217). They support validation, reduce ambiguity, and facilitate mappings across systems. Code lists require stewardship, versioning, and multilingual labels for usability.

ALTERNATIVE DEFINITIONS

Wikipedia

A controlled vocabulary is an organized arrangement of words and phrases used to index content and/or to retrieve content through browsing or searching.

Establishes the principle of governed term sets akin to code lists.

Source

Wikipedia

In computer programming, an enumerated type (enum) is a data type consisting of a set of named values called elements, members, enumerators, or enumeration literals.

Describes enumerations that underpin code value implementation in systems.

Source

RELATED TERMS

Value Set Reference Data Master Data Management Data Validation Enumerated Type ISO 3166 Data Glossary Data Quality Class Hierarchy

COMPETING TERMS

Free-Text Values

RELATIONS

• Broader: Reference Data Value Set
• Narrower: Account Status

KNOWLEDGE AREAS

Reference & Master Data Data Quality Data Management Semantic & Knowledge Modeling Metadata Management

TARGET AUDIENCE

Data Steward Data Modeler Data Architect Analytics Engineer Data Engineer Information Analyst

EXTERNAL SOURCES

• Wikipedia - Controlled vocabulary
• ISO - Official country code list reference
• ISO - Official currency code list reference
• NISO - Guidelines for controlled vocabularies

TOP QUESTIONS

Why are Code Values important?

They standardize categorical data, enabling validation, interoperability, and consistent analytics across systems.

Category: Relevancy

How do you govern Code Values?

Define stewardship, change control, versioning, and publish code lists via catalogs or APIs.

Category: Governance

What is the relationship between Code Values and reference data?

Code values are often part of reference data, providing standardized categories and their labels.

Category: Relationship

How should labels relate to Code Values?

Maintain multilingual preferred labels and descriptions linked to codes for usability.

Category: BestPractice

What risks arise from unmanaged Code Values?

Duplicate codes, ambiguous meanings, and mapping errors can corrupt analytics and integrations.

Category: Risk

How do you evolve Code Values safely?

Use versioned code lists, deprecations, and clear migration mappings to replacements.

Category: HowTo

What are common sources of Code Values?

International standards (ISO), industry bodies, and organization-specific controlled vocabularies.

Category: Example

How do you validate Code Values in pipelines?

Apply whitelist validation, referential checks, and schema constraints in CI/CD tests.

Category: Testing

How do Code Values aid BI and ML?

They reduce noise in categoricals, improving aggregations and model feature quality.

Category: Impact