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The id attribute provides a document-wide unique identifier for an element. [7] [8] [9] This can be used as CSS selector to provide presentational properties, by ...
For these reasons, and in support of a more semantic web, attributes attached to elements within HTML should describe their semantic purpose, rather than merely their intended display properties in one particular medium.
For each skin, the user can make various choices regarding fonts, colors, positions of links in the margin, etc. CSS is specified with reference to selectors : HTML elements, classes, and ID's specified in the HTML code. Accordingly, what the possibilities are for each skin can be seen by looking at the HTML source code of a page, in particular ...
basefont (Deprecated. use CSS instead.) Presentation related attributes. background (Deprecated. use CSS instead.) and bgcolor (Deprecated. use CSS instead.) attributes for body (required element according to the W3C.) element. align (Deprecated. use CSS instead.) attribute on div, form, paragraph (p) and heading (h1...h6) elements
Specification of class and id attributes for certain boilerplate messages which should be inlined; e.g., {{merge}}. Citation templates (see above). Setting anchors in the text to which incoming links may jump; this is usually done with the {} template. Almost all HTML tags that are allowed in Wikipedia permit inline CSS styles.
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 ...
In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.
An unordered (bulleted) list. The type of list item marker can be specified in an HTML attribute: < ul type = "foo" >; or in a CSS declaration: ul {list-style-type: foo;} – replacing foo with one of the following (the same values are used in HTML and CSS): disc (the default), square, or circle.