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A web style sheet is a form of separation of content and presentation for web design in which the markup (i.e., HTML or XHTML) of a webpage contains the page's semantic content and structure, but does not define its visual layout (style). Instead, the style is defined in an external style sheet file using a style sheet language such as CSS or ...
Where element names the HTML element type, and attribute is the name of the attribute, set to the provided value. The value may be enclosed in single or double quotes, although values consisting of certain characters can be left unquoted in HTML (but not XHTML). [2] [3] Leaving attribute values unquoted is considered unsafe. [4]
To demonstrate specificity Inheritance Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate. Inheritance is the mechanism by which properties are applied not only to a specified element but also to its descendants. Inheritance relies on the document tree, which is the hierarchy of XHTML elements in a page based on nesting. Descendant elements may ...
This is the case for many, but not all, elements within an HTML document. The distinction is explicitly emphasised in HTML 4.01 Specification: Elements are not tags. Some people refer to elements as tags (e.g., "the P tag"). Remember that the element is one thing, and the tag (be it start or end tag) is another.
For example, if a page contains a "span" element with class FA and id lc, MediaWiki:Monobook.js specifies the style and title of elements "li" of class interwiki-lc, thus controlling the style and title of the interlanguage link of language code lc in the margin, provided that the skin specifies this class interwiki-lc (E.g., Cologne Blue ...
Text content within an element is represented as a text node in the DOM tree. Text nodes do not have attributes or child nodes, and are always leaf nodes in the tree. For example, the text content "My Website" in the title element and "Welcome" in the h1 element in the above example are both represented as text nodes.
The reference to the name element name has no ?, so a person element must contain a name element. name is a valid element name, and an instance of such an element contains "parsed character data" (#PCDATA). birthdate is a valid element name, and an instance of such an element contains parsed character data. gender is a valid element name, and ...
lang: primary language for the contents of the element per BCP 47. style: applies CSS styling to the contents of the element. title: advisory information associated with the element. HTML5 microdata attributes apply to all tags: [2] Any attribute beginning with data-itemid; itemprop; itemref; itemscope; itemtype