\dirtree{%^^A
  .1 articles\DTcomment{our articles}.
    .2 naming.tex\DTcomment{the file creating an article on naming}.
    .2 object-models.tex\DTcomment{the file creating an article on object-models}.
    .2 protocols.tex\DTcomment{the file creating an article on protocols}.
    .2 tex\DTcomment{a folder containing the tex files that include our content}.
      .3 naming.tex\DTcomment{the file including all content for naming}.
      .3 object-models.tex\DTcomment{the file including all content for object-models}.
      .3 protocols.tex\DTcomment{the file including all content for protocols}.
  }