Add citation style file.

[guifsdev]

First of all, I would like to say thank you to everyone involved in this amazing project.

I'm sorry if this is already implemented. I couldn't locate in the docs.
I would like to use ABNT as a citation style in my document. Normally I would include a .csl file in the metadata section of the markdown file I'm editing. Is it somehow possible to do with this package?

[Witiko]

Hello @guifsdev,

using the Citation Style Language (CSL) is currently not supported. Using the CSL is natural for software that only uses LaTeX as the typesetting backend, such as pandoc. By contrast, the markdown package provides only markdown parsing and a thin API: all formatting and styling is done in LaTeX. For bibliography styling, this amounts to using BibTeX, NatBib, or BibLaTeX, see the example below. If there ever exists support for the CSL in LaTeX, I should be able to add it to the markdown package easily. However, that's not the case at the moment.

\documentclass{article}
\usepackage{filecontents}
\begin{filecontents*}{document.bib}
@book{knuth:tex,
  author    = "Knuth, Donald Ervin",
  title     = "The \TeX book, volume A of Computers and typesetting",
  publisher = "Addison-Wesley",
  year      = "1984"
}
\end{filecontents*}
\usepackage[backend=biber]{biblatex}
\addbibresource{document.bib}
\usepackage[citations]{markdown}
\begin{document}

\begin{markdown}
The TeXbook [@knuth:tex, p. 123 and 130] was written by @knuth:tex.
\end{markdown}

\printbibliography
\end{document}

Example above was taken from the user manual. To learn how to change citation styles with BibLaTeX, see the tutorial on Overleaf.

[guifsdev]

@Witiko Thank you very much for the clarification. I'll be looking forward for this feature.

[zepinglee]

If there ever exists support for the CSL in LaTeX, I should be able to add it to the markdown package easily. However, that's not the case at the moment.

I'm currently working on https://github.com/zepinglee/citeproc-lua which is aimed to provide CSL support for LaTeX. It will be published to CTAN soon.