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In HTML syntax, an attribute is added to a HTML start tag. Several basic attributes types have been recognized, including: (1) required attributes needed by a particular element type for that element type to function correctly; (2) optional attributes used to modify the default functionality of an element type; (3) standard attributes supported ...
Some HTML elements are defined as empty elements and take the form < tag attribute1 = "value1" attribute2 = "value2" >. Empty elements may enclose no content, for instance, the < br > tag or the inline < img > tag. The name of an HTML element is the name used in the tags. The end tag's name is preceded by a slash character /. If a tag has no ...
New attributes were introduced, some elements and attributes were removed, and others such as <a>, <cite>, and <menu> were changed, redefined, or standardized. The APIs and Document Object Model (DOM) are now fundamental parts of the HTML5 specification, [ 8 ] and HTML5 also better defines the processing for any invalid documents.
Informally, HTML elements are sometimes referred to as "tags" (an example of synecdoche), though many prefer the term tag strictly in reference to the markup delimiting the start and end of an element. Element (and attribute) names may be written in any combination of upper or lower case in HTML, but must be in lower case in XHTML. [8]
In HTML DOM (Document Object Model), every element is a node: [4] A document is a document node. All HTML elements are element nodes. All HTML attributes are attribute nodes. Text inserted into HTML elements are text nodes. Comments are comment nodes.
Download as PDF; Printable version; ... Where no existing HTML element is applicable, ... attributes attached to elements within HTML should describe their semantic ...
Element declarations name the allowable set of elements within the document, and specify whether and how declared elements and runs of character data may be contained within each element. Attribute-list declarations name the allowable set of attributes for each declared element, including the type of each attribute value, if not an explicit set ...
The <article> element only includes the global HTML attributes such as contenteditable, id, and title. [2] However, pubdate, an optional boolean attribute of the <time> element, is often used in conjunction with <article>. If present, it indicates that the <time> element is the date the <article> was published.