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An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment nodes and others). [vague] The first used version of HTML was written by Tim Berners-Lee in 1993 and there have since been many versions of HTML.
HTML 3.0 [44] was proposed as a standard to the IETF, but the proposal expired five months later (28 September 1995) [45] without further action. It included many of the capabilities that were in Raggett's HTML+ proposal, such as support for tables, text flow around figures, and the display of complex mathematical formulas. [45]
Very short sections and subsections clutter an article with headings and inhibit the flow of the prose. Short paragraphs and single sentences generally do not warrant their own subheadings. Headings follow a six-level hierarchy, starting at 1 and ending at 6. The level of the heading is defined by the number of equals signs on each side of the ...
Subsection headings of level 3 and below (===Subheading===, ====Sub-subheading====, etc., markup). There are five heading levels used in writing articles (the top-level one being reserved for the auto-displayed page name). [b] Terms in description lists (example: Glossary of the American trucking industry)
Headings should be descriptive and follow a consistent order, as outlined in the Manual of Style. They must be nested sequentially—beginning at level 2 (==) for the main headings, then level 3 (===), and so on. Level 1 headings, automatically reserved for the article title, should not appear within the article's body text. Skipping heading ...
firstHeading – the class of the heading tag at the top of every page; contentSub – the name of the wiki immediately underneath the main heading, but above the body text; content – the white background, thin bordered box which contains the main page content. bodyContent – the main page content within the content box
This text will display in a reduced-size font. Note that the current default size depends on context and enclosing formatting: For example, footnotes and references default to displayed in a slightly smaller-than-usual font, and headings (of various levels) default to displaying in a slightly larger font.
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.