Hello,

I would like to convert LaTeX documents with pandoc, with proper
alternative content support for images. I tried two ways which seemed
quite straight forward in LaTeX:

\usepackage{graphicx}
\usepackage{tagpdf}

\tagmcbegin{tag=Figure,alttext=My Text}
\includegraphics{test.png}
\tagmcend

\usepackage{graphicx}
\usepackage{pdfcomment}
\usepackage{accessibility}

\alt{My Text}\includegraphics{test.png}

but none of the two worked. Looking at the pandoc source code, it seems
that "image" alternative text is hardcoded. Could pandoc perhaps be
extended to support these two markings?

Samuel