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Heading elements are not intended merely for creating large or bold text – in fact, they should not be used for explicitly styling text. Rather, they describe the document's structure and organization. Some programs use them to generate outlines and tables of contents. Headings existed in HTML Tags, and were standardized in HTML 2.0; still ...
HTML markup consists of several key components, including those called tags (and their attributes), character-based data types, character references and entity references. HTML tags most commonly come in pairs like < h1 > and </ h1 >, although some represent empty elements and so are unpaired, for example < img >.
Template parameters [Edit template data] Parameter Description Type Status margin-left margin-left To set a margin on the table's lefthand side. Default 0 String optional width width To set the table's overall width. Default auto String optional style style For CSS styles amending the table's overall appearance. String optional noheaders noheaders Set (as e.g. noheaders=on) to suppress the ...
Special section headings for appendices such as ==See also== are not in italics. A further type of cross-reference may occur within a paragraph of text, usually in parentheses (round brackets). For example: At this time France possessed the largest population in Europe (see Demographics of France).
HTML has included semantic markup since its inception. [1] In an HTML document, the author may, among other things, "start with a title; add headings and paragraphs; add emphasis to [the] text; add images; add links to other pages; [and] use various kinds of lists".
For example, headings (h1 elements), sub-headings (h2), sub-sub-headings (h3), etc., are defined structurally using HTML. In print and on the screen, choice of font , size , color and emphasis for these elements is presentational .
The meta element has two uses: either to emulate the use of an HTTP response header field, or to embed additional metadata within the HTML document. With HTML up to and including HTML 4.01 and XHTML, there were four valid attributes: content, http-equiv, name and scheme. Under HTML 5, charset has been added and scheme has been removed.
The = through ===== markup are headings for the sections with which they are associated. A single = is styled as the article title and should not be used within an article. Headings are styled through CSS and add an [edit] link. See this section for the relevant CSS. Four or more headings cause a table of contents to be generated automatically.