$relative_template_dir
behaves almost like $template_dir, except that it adds an extra feature of a relative path when it traverses on deep directories.Sample Usage: (e.g. head.tpl)
<link href="{$relative_template_dir}style.css" rel="stylesheet" type="text/css" >
HTML Source Output
Sample #1: Documentation Section
Site Path: /Documentation/
<link href="../_templates/main/style.css" rel="stylesheet" type="text/css">
Sample #2: Web Designer Section
Site Path: /Documentation/Web.Designer/
<link href="../../_templates/main/style.css" rel="stylesheet" type="text/css">