[texhax] Visually Impaired

[Philip Taylor]

William Adams wrote:

> Actually, the text part can be improved by using CMAP and other nifty things to ensure that a^2 + b^2 = c^2 comes out as something more intelligible than a two plus b two equals c two. See ``tagged pdf'', e.g., : http://tex.stackexchange.com/questions/579/how-to-create-tagged-pdf

Don't understand the significance of the link, William; it makes no 
mention of CMAP.

Philip Taylor