1. HTML
   1. Head
      1. Title
      2. Meta
      3. Link
      4. Style
      5. Script
      6. ...
   2. Body
      1. Header
         1. Nav
         2. ...
      2. Main
         1. H1
         2. Article
            1. H2
            2. P
            3. span
            4. Figure
            5. Img
            6. Figcaption
            7. Table
            8. ...
            9. Content
         3. Article 2
            1. H2
            2. P
            3. Figure
            4. ...
         4. ...
      3. Aside
         1. Nav
         2. Menue
         3. ...
      4. Section
         1. H1
         2. Article
            1. H2
            2. P
            3. span
            4. Figure
            5. Img
            6. Figcaption
            7. Table
            8. ...
            9. Content
         3. ...
      5. ...
      6. Footer
         1. Nav
         2. ...
2. !DOCTYPE html