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Single-source documentation is a way to manage reusable documentation content so it can be adapted for different software versions and output formats. The defining idea is managed reuse of previously developed information—not a particular authoring tool, file type, or universal repository for an organization’s facts.
What single-source documentation means
In software and user documentation, single-source documentation means maintaining content for reuse and adapting it for different versions of a product or different ways of presenting information. ISO/IEC/IEEE 26514:2022 describes this practice across printed, onscreen, spoken, animation, and video presentations. The standard is independent of specific software tools and does not prescribe how to configure a content management system.
“Single source” therefore describes a content-management and publishing approach. It does not mean that every organizational fact must live in one universal repository, nor does reuse by itself guarantee that content is accurate or up to date.
How it differs from a single source of truth
These phrases are related but not interchangeable. In data governance, a “single source of truth” concerns where authoritative data is maintained and how it is used across analysis or information products. The Canadian Institute for Health Information’s Data Source Assessment Tool treats accessible documentation and metadata as separate assessment criteria. Single-source documentation, by contrast, is about managing and reusing documentation content for different versions or outputs.
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What a single-source workflow can look like
One practical example is to maintain documentation as Markdown files in version control, then generate multiple deliverables from that source. New Zealand Government guidance describes using Markdown to produce HTML, PDF, DOCX, or EPUB, with version control supporting traceable changes and collaborative work. This is an example, not a requirement of ISO/IEC/IEEE 26514:2022; teams may choose tools and formats that suit their needs.
How to assess a documentation approach
When deciding whether a workflow is suitable, consider how it handles reuse, delivery formats, collaboration, and organizational controls:
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- Reuse model: Does the team manage reusable content, or maintain separate copies that can drift apart?
- Output coverage: Can the workflow deliver the print, onscreen, spoken, or multimedia formats the audience needs?
- Version and collaboration workflow: Can contributors track changes and work together in a way that fits the team?
- Tool and governance fit: Does the approach work with the organization’s chosen tools and content controls? The standard does not mandate a tool or CMS configuration.
The cited sources do not establish quantified savings, error reductions, or productivity gains from adopting the practice. Its value depends on how well the team manages and maintains reusable content.
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