Hi Jonathan, I doubt if I will be available for the meeting you mentioned. Let me just say that profiled LaTeX, as in my talk at TUG 2010 <http://www.tug.org/tugboat/tb31-2/tb98hammond.pdf>, provides a formal elucidation of the tree structure in any math expression in its author-level XML document type. My project GELLMU <http://www.albany.edu/~hammond/gellmu/> provides a didactic example. In the didactic production system there's also another formal elucidation of the math tree structure for each math expression in the spawned HTML-with-MathML output, but the latter involves only the less expressive vocabulary of presentation MathML whereas the former has a vocabulary (for element names) that is close to the command vocabulary for LaTeX. (Of course, the MathML there could be enriched using MathML <semantics> to refer back to LaTeX-like names.) I have not provided a good tuning of my didactic author-level XML for use of the blind, but I think it should not be far away for someone who wants to do that. In my talk at TUG 2014 <https://tug.org/TUGboat/tb35-2/tb110hammond.pdf> I spoke about the possibilities for direct "viewing" of (a tuning of) my didactic author-level XML in a web browser using only CSS. Thank you for providing this focus. Best regards, -- Bill -- William F Hammond Email: [log in to unmask] https://www.facebook.com/william.f.hammond http://www.albany.edu/~hammond/ On Mon, Mar 22, 2021 at 7:09 AM Jonathan Fine <[log in to unmask]> wrote in part: <https://www.freelists.org/post/program-l/Zoom-Meeting-for-Discussion-of-Blind-Coder-Online-Resources-Scheduled> > A math formula has a tree structure, as does the source code for a > computer program. There's a shared interest in navigating complex trees. > Particularly the blind math people who prefer to read math via the LaTeX > source file. >