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The article tag should have independent, selfcontained content. This means it should stand on its own, without the need for information from any other section of the web page.
The difference between it, and the main tag ( • Intro to HTML5: The Main Tag Part 9 ), is that you can have multiple article tags on a web page. Let’s say you have a category page, you might have several articles listed with content, each independent of one another.
In this video we look at that idea, and how we can use it to our advantage to organize our data.