8.2. Tag ordered lists with <ol> and <li>
Use the <ol> and <li> tags to mark up lists of items that must appear in a specific order (list of steps in a procedure, ranking, etc.). In other words, when the information would not be understood if the items were presented in a different order.
If required, make sure that lists are properly nested:
<ol>
<li>First item of first level</li>
<li>
Second item of first level
<ul>
<li>First item of second level</li>
<li>Second item of second level</li>
</ul>
</li>
<li>Third item of first level</li>
</ol>
What are the advantages?
Structuring lists is essential for people using a screen reader (blind or visually impaired). When they come across a structured list, they are able to:
- Navigate from list to list within a page.
- Know from the start the number of elements in the list.
- Navigate more easily through the list:
- Go directly to the end of the list if they are not interested in the content.
- Easily return to the top of the list.