<ol>

ol represents the container for an ordered list. An order list has a default User Agent (UA) setting: line items are numbered. However, CSS provides variant alphabetical or numerical marker types.

Start tag:
<ol>
End tag:
</ol>
Example [Basic]:

Two aspects of Web Standards for those what wants to neglect them.

  1. Validation: Web browsers' error-handling and recovery make validation unnecessary.
  2. Semantics: Semantic Web Efforts are encouraging but proper grammatical use of HTML elements like italic versus emphasis are unnecessary.
Code [HTML]:

<p>Two aspects of Web Standards for those what wants to neglect them.</p>
<ol>
<li><strong>Validation:</strong> Web browsers' error-handling and recovery make validation unnecessary.</li>
<li><strong>Semantics:</strong> <a href="http://www.w3.org/2001/sw/" title="View 'W3C Semantic Web Activity' 
site">Semantic Web Efforts</a> are encouraging but <span class="oblique"> proper</span> grammatical use of 
<abbr>HTML</abbr> elements like italic versus emphasis are unnecessary.<li>
</ol>
Example [Basic (Sub-sections)]:
  1. What makes a website search-engine friendly?
    1. Use WCAG Samurai when Web Content Accessibility Guidelines (WCAG) are involved
    2. Use Resource Description Framework - in - attributes (RDFa) Attributes
    3. Use CSS with Markup Languages sans tables
  2. Are search engines Assistive Technologies (AT) devices? —Yes.
  3. Are search engines like screen readers? —Yes.
Code [HTML]:

<ol>
<li>What makes a website search-engine friendly?
     <ol style="list-style-type:lower-roman;">
<li>Use WCAG Samurai when Web Content Accessibility Guidelines (WCAG) are involved</li>
<li>Use Resource Description Framework - in - attributes (RDFa) Attributes</li>
<li>Use CSS with Markup Languages sans tables</li>
     </ol>
</li>
<li>Are search engines Assistive Technologies (AT) devices? —<strong>Yes.</strong></li>
<li>Are search engines like screen readers? —<strong>Yes.</strong></li>
</ol>
Element-Type:
List
Attributes:

</ol>