Adds an HTML 5 outline plus a heading-level outline to the WordPress Toolbar.

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<p>WP HTML5 Outliner (WPH5O) adds an HTML 5 outline plus a heading-level outline to the WordPress Toolbar.</p>
<h4>Features</h4>
<ul>
<li>Matches the outlines provided by the <a href="https://validator.w3.org/#validate_by_uri+with_options" rel="nofollow ugc">W3C Markup Validation Service</a>. <em>Caveat</em>: In an HTML 5 outline, the W3C validator may hide some of the headings in an <code><hgroup></code> if any of them are empty. WPH5O will not. This difference is presentational, not structural.</li>
<li>Adds an ‘Outline’ node to the Toolbar. Outlines are displayed in a dropdown box, with the option to view them in a new browser window.</li>
<li>Runs only on pages or posts the user can edit. Administrators can view outlines for any page or post. Administration Screens are not outlined.</li>
</ul>


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