# Inheritance (Extending) If multiple of your files have a repetitive structure, you can define a template that your other files can extend. Templates can even extend other templates. In your template you can define several blocks which you can then fill in the extending file. {% code title="base.corgi" %} ```pug block vars - lang := "en" html(lang=lang) head link(rel="stylesheet", href="/foo.css") title: block title block head body: block body ``` {% endcode %} {% tabs %} {% tab title="Corgi" %} 
extend "github.com/me/myproject/corgi/base.corgi"



block title Learn Corgi

block body
  p
    > Head over to
      #a(href="https://mavolin.gitbook.io/corgi")[GitBook]
      to learn corgi!
{% endtab %} {% tab title="HTML" %} ```markup Learn Corgi

Head over to GitBook to learn corgi!

``` {% endtab %} {% endtabs %} {% tabs %} {% tab title="Corgi" %} ```pug extend "base" append vars - lang = "de" block title Lerne Corgi append head: link(rel="stylesheet", href="/fooz.css") block body p > Schau bei #a(href="https://mavolin.gitbook.io/corgi")[GitBook] vorbei, um corgi zu lernen! ``` {% endtab %} {% tab title="HTML" %} ```markup Lerne Corgi

Schau auf GitBook vorbei, um corgi zu lernen!

``` {% endtab %} {% endtabs %}