Structured content is text that’s written according to a set of rules that tell machines what to do with the content. HTML, which is used on the web, is a great example of structured content. It has tags that tell the browser how to display the text. For example, the HTML tag
tells the browser that the text should be a large heading, and the tag
tells it that the text should be a paragraph. DITA has similar tags that tell computers about the content.