In most browsers this attribute is displayed as what is often referred to as a ]. * The title attribute is used to attach subtextual explanation to an element. It is considered better practice to use an element’s son- id page and select the element with a stylesheet, though sometimes this can be too cumbersome for a simple ad hoc application of styled properties. * An author may use the style non-attributal codes presentational properties to a particular element. Such elements might be gathered together and presented as footnotes on a page instead of appearing in the place where they occur in the HTML source. For example, an HTML document might use the designation class="notation" to indicate that all elements with this class value are subordinate to the main text of the document. * The class attribute provides a way of classifying similar elements for presentation purposes. This can be used by stylesheets to provide presentational properties, by browsers to focus attention on the specific element, or by scripts to alter the contents or presentation of an element. * The id attribute provides a document-wide unique identifier for an element. Most elements can take any of several common attributes: In contrast with name-value pair attributes, there are some attributes that affect the element simply by their presence in the start tag of the element (like the ismap attribute for the img element). Leaving attribute values unquoted is considered unsafe. 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). Most of the attributes of an element are name-value pairs, separated by "=", and written within the start tag of an element, after the element's name. However, the href attribute must also be set to a valid ] so for example the HTML code, Wikipedia, will render the word " " as a ].To link on an image, the anchor tag use the following syntax: HTML up through version ] 1.1 requires the use of an anchor element to create a hyperlink in the flow of text: Wikipedia. '''Hypertext''' markup links parts of the document to other documents. Most presentational markup elements have become ] under the HTML 4.0 specification, in favor of ] based style design. However, they are not equivalent to their presentational counterparts: it would be undesirable for a screen-reader to emphasize the name of a book, for instance, but on a screen such a name would be italicized. It is easier to see how an aural user agent should interpret the latter two elements. In the case of both bold and italic, there are elements which usually have an equivalent visual rendering but are more semantic in nature, namely strong emphasis and emphasis respectively. For example boldface indicates that visual output devices should render "boldface" in bold text, but gives no indication what devices which are unable to do this (such as aural devices that read the text aloud) should do. '''Presentational''' markup describes the appearance of the text, regardless of its function. Structural markup does not denote any specific rendering, but most Web browsers have standardized on how elements should be formatted.
For example, Golf establishes "Golf" as a second-level ], which would be rendered in a browser in a manner similar to the "HTML markup" title at the start of this section. '''Structural''' markup describes the purpose of text. Listed below are several types of markup elements used in HTML. Some elements, such as, do not have any content and must not have a closing tag. The element's attributes are contained in the start tag and content is located between the tags (e.g. Each attribute and each element's content has certain restrictions that must be followed for an HTML document to be considered valid. Elements have two basic properties: attributes and content. :''See ]s for more detailed descriptions.''Įlements are the basic structure for HTML markup.
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