SSOT (Single Source of Truth) is a design principle that gives each piece of data one canonical, authoritative location. All consumers reference that source, other representations are derived from it, and it is the definitive version when conflicts arise. Unlike SPOT (Single Point of Truth), which focuses on the implementation pattern, SSOT applies at the architecture and organizational level.

SSOT (Single Source of Truth)

Details
Full Name

Single Source of Truth

Core Concepts:

Conceptual principle

Focuses on establishing trust and authority for data

Authoritative source

One canonical, trusted location for each piece of data

Data integrity

All consumers reference the same trusted source

Version control

Single source ensures consistent versioning

Derived data

Other representations are derived from the single source

Trust and reliability

The source is the definitive version when conflicts arise

System of record

The primary data store for critical business information

Organizational practice

Applied at the architecture and business process level

Key Application Areas:

  • Version control systems (Git as SSOT for code)

  • Database design and data warehousing

  • Documentation and knowledge management

  • Configuration management

  • Master data management (MDM)

When to Use:

  • Designing data architecture for enterprise systems

  • Establishing documentation standards and knowledge bases

  • Building data pipelines and ETL processes

  • Implementing microservices with clear data ownership

  • Creating audit trails and ensuring compliance

  • Resolving conflicts between multiple data sources

    Difference from SPOT

    SSOT emphasizes the authoritative, trusted nature of a data source and is used at the architecture/organizational level, while SPOT focuses on the implementation pattern

    Related Concepts

    DRY, SPOT, Event sourcing, Data lakes, Master data management