What is a Single Source of Truth in technical documentation?

A Single Source of Truth is the central principle of structured authoring. Information such as a safety warning, a procedure, or a specification is written once, stored in one place, and reused by reference.

This avoids copy-paste, divergent versions, and manual updates across multiple files. When the source changes, the correction can be propagated across the documentation corpus.

In Calenco, the Single Source of Truth applies to content modules, variants, translations, and publications. It improves consistency, reduces errors, and makes technical documents easier to maintain across multiple formats.

The single source, or single source of truth (SSOT), is the fundamental principle of structured authoring: each piece of content, a safety warning, a procedure, a technical specification, is written once, stored in one place, and reused by reference in all the documents that need it. When the source is modified, the update propagates automatically throughout the entire documentation corpus.

This is the essential difference from copying and pasting in Word or InDesign: a copy duplicates information, creating divergent versions, errors and manual updating work on each affected document. With a single source, information exists in only one instance, like an object reflected in several mirrors: change the object, and all the reflections change instantly.

In a CCMS, the single source is a technical reality: documents do not contain copies of reusable content, but references to it. This ensures consistency, reduces errors and eliminates outdated versions.

Calenco applies this principle throughout its platform: each content module is stored in a single source, reusable in multiple documents, and updated in one place for all multi-format publishing formats (PDF, web, tablet).