21 January 2026
(From the STM blog – https://stm-assoc.org/stm-unveils-draft-alt-text-taxonomy/)
This draft is the result of a collaborative effort by STM members to support accessible publishing, with a focus on helping authors and publishers write better image descriptions (alt text). Not only does it help prepare for the upcoming ADA Title II update (coming into effect April 2026), it also supports our shared goal of making scholarly content more inclusive and available to all.
Why a taxonomy? Because alt text isn’t one-size-fits-all. Describing a chart requires different guidance than a medical scan, photograph, or diagram. The taxonomy provides 15 top-level categories — each with definitions, guidance, examples, and subcategories — to help identify image types and write effective descriptions.
The TFG, formed in early 2025 through STM’s Standards & Technology Committee, includes accessibility experts and publishing professionals from across the US, UK, and Europe. The group has met monthly to build consensus and develop practical tools for our community.
Now we need your input. The draft taxonomy is available for public comment until February 28, 2026. Your feedback will help ensure this resource is useful, usable, and inclusive.
Download the draft taxonomy here
Share your input via this form by Feb 28
You’re invited to join 10 February for a live, virtual overview of the draft report — including a demonstration of the interactive tool that complements the taxonomy.