Block element

• <ul><li>
• View
• level 1
• level 2
• level 21
• level 22
• Code

<ul>
 <li>level 1</li>
 <li>level 2</li>
 <ul>
  <li>level 21</li>
  <li>level 22</li>
 </ul>
</ul>

• <ol><oi>
• View
1. level 1
2. level 2
1. level 21
2. level 22
• Code

<ol>
 <li>level 1</li>
 <li>level 2</li>
 <ol>
  <li>level 21</li>
  <li>level 22</li>
 </ol>
</ol>