An element with a specific namespaceURI value from HTML namespaces. For example an "SVG element" is any element with the "SVG namespace", which is
Namespaced elements are not limited to elements described in a specification. They also include custom elements. Elements such as
title have a different namespace depending on where they are used. For example a
title in an HTML page usually has the HTML namespace. When used in an
svg element, a
title element has the SVG namespace instead.