\dirtree{%^^A
    .1 [root]\DTcomment{for instance $/doc$}.
      .2 database\DTcomment{folder for all sorts of data for the repository}.
        .3 latex\DTcomment{data in \LaTeX, such as our acronyms}.
        .3 bibtex\DTcomment{{\scshape Bib\TeX} database}.
        .3 [...].
      .2 figures\DTcomment{folder for figures, my sources are SVG \& PDF}.
        .3 [...].
      .2 repository\DTcomment{folder for the text files}.
        .3 [...].
  }