LaTeX to HTML conversion: \label and \ref work for figures but not equations

[lnelson2382]

Explain the problem.
When converting LaTeX input to HTML output with mathML, \ref{label} commands within the text get converted to in-page hyperlinks. These hyperlinks work correctly for sections and figures, as the corresponding HTML objects are given the marker id="label", but not for equations, which just end up with dead hyperlinks.

Sample input file "label.tex":

\documentclass{article}
\begin{document}
\section{Section} \label{section}
\begin{equation}
\label{eq:sample}
y^2 = a x^3 + bx + c
\end{equation}
This is Equation~\ref{eq:sample}, in Section~\ref{section}, with Figure~\ref{fig:sample}
\begin{figure}
\centering
\begin{tabular}{c|c}
1 & 0 \
0 & 1
\end{tabular}
\label{fig:sample}
\caption{A figure}
\end{figure}
\end{document}

Pandoc Command
pandoc -f latex -t -html --mathml label.tex -o label.html

Expected vs Actual Result
The html file which is produced contains three internal hyperlinks; the links to the section and the figure work correctly, but the link to the figure leads to a nonexistent location in the page.

Pandoc version?
Pandoc 3.4 (Windows x86_64)
Pandoc 2.5 (Ubuntu on WSL)

[lnelson2382]

(I should specify - the Windows version is Windows 10)

[tarleb]

I've written a Lua filter for this, querverweis. It is work in progress, but I'd be happy to try and make it work for your usecase.

[lnelson2382]

Thanks for the suggestion! I downloaded the filter, and it seems to make the equation linking work, but it also strips out semantically important spaces, such as turning the valid LaTeX $\omega t$ into the nonsensical $\omegat$. I can look for a minimal example and submit a bug report to your repository if that will be helpful.

[tarleb]

That's weird. Please open a bug report there.