Metadata content

Elements belonging to the metadata content category modify the presentation or the behavior of the rest of the document, set up links to other documents, or convey other out-of-band information. Everything in the <head>, including the <title>, <link>, <script>, <style>, and the lesser used <base>, is metadata content. There is a <meta> element for metadata that cannot be represented by these other elements.

The metadata elements are:

Some of these elements belong to more than one content category. For example, <script> is a member of the metadata, flow, and phrasing content categories, and is a script-supporting element; <script> can be used where metadata content, phrasing content, or script-supporting elements are expected.

Flow content

Flow content is a broad category that encompasses most elements that can go inside the <body> element, including heading elements, sectioning elements, phrasing elements, embedding elements, interactive elements, and form-related elements. It also includes text nodes (but not those that only consist of white space characters).

The flow elements are: