Chapter 13. Microdata, Other Small Things, and Beyond HTML5

We began this book with the new HTML5 semantic tags, which allow a page’s HTML content to be organized in meaningful, structured ways. This final chapter introduces a small but powerful application programming interface (API) that brings much more semantic utility to HTML.

Semantic information is information with annotations or signifiers. Microdata is a specification in HTML5 that can be used to nest semantics within existing web content, allowing authors to create any kind of arbitrary annotation. Programs (especially search engines and web crawlers) can search for these annotations and extract ...

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