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+% !Mode:: "TeX:DE:UTF-8:Main"
+%\input{regression-test}
+\documentclass{article}
+\usepackage{tagpdf}
+\tagpdfsetup{tabsorder=structure,
+ uncompress,activate-all}
+\tagpdfifpdftexT
+ {
+ %set language / can also be done with hyperref
+ \pdfcatalog{/Lang (de-DE)}
+ \usepackage[T1]{fontenc}
+ \input glyphtounicode
+ \pdfgentounicode=1
+ }
+
+\tagpdfifluatexT
+ {
+ %set language / can also be done with hyperref
+ \pdfextension catalog{/Lang (de-DE)}
+ \usepackage{fontspec}
+ \usepackage{unicode-math}
+ \usepackage{luacode}
+ \newfontface\zerowidthfont{freeserif}
+ }
+
+\usepackage{graphicx}
+% This is not a perfectly tagged document!
+% one sentence is not marked (luatex will mark it as artifact)
+% with pdflatex there is a encoding problem with the math
+
+\begin{document}
+\pagestyle{empty}
+
+\tagstructbegin{tag=Document}
+
+%This isn't read by voice software
+Etwas unmarkierter Text.
+
+%This read ok by voice software
+\tagstructbegin{tag=P}
+ \tagmcbegin{tag=P}
+ Ein Satz ohne Umlaute.
+ \tagmcend
+\tagstructend
+
+%This read ok by nvda, but adobe has difficulties with the umlauts
+\tagstructbegin{tag=P}
+ \tagmcbegin{tag=P}
+ Grüße an die Welt und die öde Wüste.
+ \tagmcend
+\tagstructend
+
+\newpage
+% alttext is read,
+% actualtext copy & pasted
+\tagstructbegin{tag=P,alttext=Dies ist ein Text,actualtext=Copy}
+ \tagmcbegin{tag=P}
+ Test
+ \tagmcend
+\tagstructend
+
+%alttext is read,
+%actualtext copy & pasted
+\tagstructbegin{tag=P}
+ \tagmcbegin{tag=P,alttext=Dies ist ein zweiter Text,actualtext=Copy}
+ Test
+ \tagmcend
+\tagstructend
+
+
+%nvda: alttext of structure is read
+%adobe: alttext of inner mc is read
+% result of copy & paste of this page in adobe reader:
+% why twice??????
+% Copy Copy
+% Copy Copy
+% Copystruct Copystruct
+
+\tagstructbegin{tag=P,alttext=Dies ist der Structuretext,actualtext=Copystruct}
+ \tagmcbegin{tag=P,alttext=Dies ist der innere Text,actualtext=Copymc}
+ Test
+ \tagmcend
+\tagstructend
+
+
+
+\newpage
+% test of "Formula" tag:
+% content is more or less ignored. This is not against the documentation:
+% Formula is explicitly describes as an "illustration", something with a content
+% which can not be read directly.
+% But it is a problem that nvda ignores it even with an alt text.
+
+%test of Formula tag + alttext in the mc
+%pdflatex
+%nvda: content is ignored
+%adobe: reads the alt text but without {} and ()
+
+%luatex (unicode-math):
+% nvda: doesn't read
+%adobe: doesn't read (warning "empty page")
+
+\tagstructbegin{tag=Formula}
+ \tagmcbegin {tag=Formula,alttext={\frac{a}{b}+c + \int_1^n f(x)}}
+ xxx $\frac{a}{b}+c + \int_1^n f(x)$
+ \tagmcend
+\tagstructend
+
+\newpage
+
+%test of Formula tag + alttext in the struct
+\tagstructbegin{tag=Formula,alttext=Dies ist eine Formel}
+ \tagmcbegin {tag=Formula}
+ formula
+ \tagmcend
+\tagstructend
+
+\newpage
+% test of Formula tag without alttext
+% pdflatex
+% adobe: reads it more or less (without commands naturally)
+% nvda: ignores it
+
+%lualatex
+%nvda: ignores it
+%adobe: ignores it
+
+\tagstructbegin{tag=Formula}
+ \tagmcbegin {tag=Formula}
+ formula: $\frac{a}{b}+c + \int_1^n f(x)$
+ \tagmcend
+\tagstructend
+
+\newpage
+% luatex:
+% nvda: reads the alttext ok, {} and () are only read if the symbol level is (at leat) "most"
+% adobe: something is read but it is not understable
+
+\tagstructbegin{tag=P}
+ \tagmcbegin {tag=P,alttext={\frac{x}{y}+c + \int_1^n f(x)}}
+ $\frac{x}{y}+c + \int_1^n f(x)$
+ \tagmcend
+\tagstructend
+
+%pdftex
+% sum is read as "pi"
+%luatex
+%adobe: almost nothing read (only 1 and =)
+%nvda: similar, obviously both have problems with the unicode math symbols
+\tagstructbegin{tag=P}
+ \tagmcbegin {tag=P}
+ $\sum_1^n (1) = n $
+ \tagmcend
+\tagstructend
+
+\newpage
+
+\tagmcbegin{tag=P,
+ actualtext=Ente,
+ alttext=Dies ist eine Ente}
+ %% a char is needed so that actualtext works,
+ \tagpdfifluatexTF
+ {{\zerowidthfont^^^^200c}}%
+ {\makebox[0pt][l]{.}}%
+ %it seems not to be needed for alttext and voice software ....
+ \includegraphics[width=1cm]{example-image-duck}
+\tagmcend
+
+\tagmcbegin{tag=P,
+ actualtext=Ente,
+ alttext=Dies ist eine zweite Ente}
+ %% a char is needed so that actualtext works,
+ %\tagpdfifluatexTF
+ % {{\zerowidthfont^^^^200c}}%
+ % {\makebox[0pt][l]{.}}%
+ %it seems not to be needed for alttext and voice software ....
+ \includegraphics[width=1cm]{example-image-duck}
+\tagmcend
+
+\tagstructend
+\end{document}