Asides are frequently presented as sidebars or call-out boxes. The HTML element represents a portion of a document whose content is only indirectly related to the document's main content. Examples include: a forum post, a magazine or newspaper article, or a blog entry, a product card, a user-submitted comment, an interactive widget or gadget, or any other independent item of content. The HTML element represents a self-contained composition in a document, page, application, or site, which is intended to be independently distributable or reusable (e.g., in syndication).

The HTML element indicates that the enclosed HTML provides contact information for a person or people, or for an organization. It only contains text tags within the element are ignored. The HTML element defines the document's title that is shown in a Browser's title bar or a page's tab. It contains CSS, which is applied to the contents of the document containing the element. The HTML element contains style information for a document, or part of a document. The HTML element represents Metadata that cannot be represented by other HTML meta-related elements, like base, link, script, style or title. This element is most commonly used to link to CSS, but is also used to establish site icons (both 'favicon' style icons and icons for the home screen and apps on mobile devices) among other things. The HTML element specifies relationships between the current document and an external resource. The HTML element contains machine-readable information (metadata) about the document, like its title, scripts, and style sheets. There can be only one element in a document. The HTML element specifies the base URL to use for all relative URLs in a document. HTML table advanced features and accessibility.From object to iframe - other embedding technologies.Assessment: Structuring a page of content.

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