Single-Sourcing and Reusability
The core value of a HAT is the ability to write a topic once and reuse it in multiple outputs. Look for robust snippet and variable management, which allow you to update a single piece of information—such as a product name or a warning—and have that change reflected instantly across all your user manuals and help centers.
Multi-Channel Publishing
Modern documentation must exist where the user is. Your chosen tool should be capable of producing various formats simultaneously, including responsive HTML5 for web browsers, PDF for printable guides, and integrations for mobile or software-embedded help.
Conditional Content Filtering
Conditional tagging allows you to exclude or include specific content based on the target audience. For example, if you have one product with a "Standard" and "Pro" version, you can use tags to hide Pro-only features from the Standard user manual, all while maintaining a single project file.
Collaboration and Version Control
Technical writing is often a team effort. Look for tools that support version control (often through integration with Git or internal CMS workflows), allowing multiple authors to work on the documentation simultaneously without overwriting each other’s progress.