The tag definition and usage instructions in html
tag is used to group title elements.
When the title has multiple levels (subtitles), the element is used to group a series of -
elements.
Example
Use tag to group titles
<hgroup> <h1>Welcome to my WWF</h1> <h2>For a living planet</h2> </hgroup> <p>The rest of the content...</p>
Differences between HTML 4.01 and HTML5 The
tag is a new tag in HTML 5.
Global attributes
tag supports HTML global attributes.
Event attributes
tag supports HTML event attributes.
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