To HTML Content Category Flow

Html elements h1, abbr, and aside

h1 element Heading Level 1, abbr element Specifies that a string is an abbreviation for a longer word or phrase, aside element Defines content aside from the page content. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

Restore previous example

h1 h1 and abbr, h1, abbr, and aside

Advanced example

Click the html element name in the punctuation list to advance the example in 'Tryit-Editor':

You cannot advance example level further.

HTML element example

Result from the Online TryIt-Editor
chrome 2.0safari 1.0Firefox 1.0ie 2.0opera 6.0