% This file is public domain. See the "Examples" chapter
% in the bib2gls user manual for a more detailed description
% of this file.

\documentclass[fontsize=12pt]{scrartcl}

\usepackage[T1]{fontenc}

\usepackage[colorlinks]{hyperref}
\usepackage[record,% use bib2gls
 nostyles,% don't load default styles
% load glossary-tree.sty and patch styles:
 stylemods={tree},
 style=treegroup]{glossaries-extra}

% abbreviation style must be set before \GlsXtrLoadResources
\setabbreviationstyle[markuplanguage]{long-short-desc}

\GlsXtrEnableInitialTagging{markuplanguage}{\abbrvtag}

\renewcommand*{\glsxtrlongshortdescname}{%
  \protect\protect\glsabbrvfont{\the\glsshorttok}\space
  \glsxtrparen{\glslongfont{\the\glslongtok}}%
}

\GlsXtrLoadResources[
 src=markuplanguages,% data in markuplanguages.bib
 loc-suffix,
 category=markuplanguage,
 description-case-change=firstuc
]

\newcommand{\glsxtrpostdescmarkuplanguage}{%
  \glsxtrifhasfield{location}{\glscurrententrylabel}%
  {,}%
  {.}%
}

\glssetcategoryattribute{markuplanguage}{glossname}{firstuc}

\renewcommand*{\glsxtrtagfont}[1]{\underline{\glsuppercase{#1}}}

\begin{document}

\section{First Use}

\gls{LaTeX}, \gls{markdown}, \gls{xhtml}, \gls{mathml}, \gls{svg}.

\section{Next Use}

\gls{LaTeX}, \gls{markdown}, \gls{xhtml}, \gls{mathml}, \gls{svg}.

\GlsXtrSetDefaultNumberFormat{glsignore}
\printunsrtglossary
\end{document}