HTML Language types

HTML is a markup language and is not programmed as such, but is simply written. A similar approach (logical description), as behind HTML is behind the typesetting system TeX/LaTeX, which in contrast to HTML, however focuses on the output via printer on paper.

Versions

HTML was devised on 13th March 1989 by Tim Berners-Lee at CERN in Geneva.
HTML (without the version number on 3rd November 1992): The original version, which is oriented only to text.
HTML (without the version number on 30th April 1993): The text comes in addition to attributes such as bold or italic display the image integration.

HTML + (November 1993) Planned enhancements were incorporated into later versions, but were never adopted as an HTML +.
HTML 2.0 (November 1995): The version defined by RFC 1866 introduces a form including technology. The status of this standard is “HISTORIC”. And its predecessor obsolete.
HTML 3.0: The version does not appear, because it is obsolete with the introduction of the Netscape browser in version 3, even before publication.
HTML 3.2 (January 14th 1997): New in this version are numerous features such as tables, text flow around images, integration of applets.

HTML 4.0 (18th December 1997): This version introduces style sheets, scripts and frames. Also a separation in Strict, Transitional and Frameset was done. On 24th April 1998 a slightly revised version of this standard was published.
HTML 4.01 (24th December 1999): Replaced HTML 4.0 with many small corrections.
HTML5 (Working Draft, 23rd April 2009): HTML5 created based on HTML 4.01 and XHTML 1.0, with a new vocabulary. HTML DOM specification will also be revised and expanded.
XHTML 1.0 (26th January 2000): A reformulation of HTML 4.01 with the help of XML. On 1st August 2002 published a revised version.
XHTML 1.1 (31st May 2001): When XHTML is divided into modules which are defined in XHTML 1.1 strict version, in which the accounts introduced by HTML 4 Transitional and Frameset variants.
XHTML 2.0 (Working Draft, 26th July 2006): This version is no longer based on HTML 4.01 and introduces some new tags, such as for navigation lists. The separation of distinction and style to be completed in this version – The W3C has begun work on XHTML 2.0 in favor of HTML5 set.

HTML structure
General structure

An HTML document consists of three areas:
the document type (doctype) at the very beginning of the file that specifies the document type used (DTD), such as HTML 4.01 Strict,
the HTML head (HEAD), mainly technical or documentary information containing the majority are not visible in the browser and
the HTML body (BODY), which contains information to be displayed.
Thus, the basic structure of a Web page looks like this:
DOCTYPE HTML PUBLIC “- / / W3C / / DTD HTML 4.01 / / EN” “http://www.w3.org/TR/html4/strict.dtd”>

Site Title

Contents of the Web

HTML header
In the head of seven different elements can be applied:
Title – designates the title of the page that appears in the title bar (on this page Hypertext Markup Language – Wikipedia).
Meta – can contain multiple metadata. See meta tags.
Base – specifies either a base URI and a base frame.
Link – is used to indicate logical relationships to other resources. Most frequently used for the integration of style sheets.
Script – binds a specific code in a scripting language, especially JavaScript.
Style – contains stylesheet code, mainly CSS rules.
Object – binds an external file. Browser may not display such objects in the document head.

HTML Body

HTML distinction between block and inline elements. The main difference is that the former produce a separate block in the output, where the content will be accommodated, while inline elements do not interrupt the flow of text – this must be said that some elements can be transformed with the help of CSS in the other format. The block elements include, for example, the headings and tables.

A main heading:

main heading
h1 stands for Heading 1, then, distinguishes a heading from the highest outline level. Next are h2 to h6, header second to sixth outline level. The presentation of these headings is independent of its structuring significance and may be affected by CSS.
A hyperlink: This is a link to example.com

Hyperlinks are references to other files, usually also HTML files that can be tracked normally in the browser by clicking on it. This link could be rendered:

This is a link to example.com.

The logic is the elements are strong and ready, which is heavily accented and highlighted text therefore is distinguished.

By default (as per W3C standard) they are strong and in bold or italic font. The structure description of the text, as illustrated, is easier to customize the rendering of the viewer to read some text for the visually impaired in the form of Braille.