How-to Accessible PDFs using UXP

We are developing a UXP plug-in for Adobe InDesign 2026  that will be FREE to automate the generation of accessible PDFs (for people with low vision) directly from InDesign.

We have conducted a series of tests, and some concepts do not work as indicated in the Adobe documentation.

1) According to Adobe’s official documentation (https://helpx.adobe.com/indesign/using/creating-accessible-pdfs.html) and various YouTube tutorials, reading order is achieved by placing elements into Articles, and the order of these elements defines the first level. The second level consists of anchored objects and text tagged with export tags, not XML. We export as an interactive PDF with the “Create Tagged PDF” option enabled. We have verified using the PAC tool (2026) (PDF/UA Foundation, an internationally recognized organization based on the WCAG accessibility standard) that the order of elements within the article is not reflected in PAC (via the "Screen reader preview" button). The result is the same whether “Use structure for tab order” is enabled or not: the entire document is exported without taking Articles or the internal order of their elements into account.

2)  We have verified that if we correctly build the XML structure—with properly ordered elements, including marking as Artifact what should not be read, and with anchored images—PAC displays it correctly

So all accessibility features are generated from the XML structure?

Thanks in advance