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HTML documents imply a structure of nested HTML elements. These are indicated in the document by HTML tags, enclosed in angle brackets thus: < p >. [73] [better source needed] In the simple, general case, the extent of an element is indicated by a pair of tags: a "start tag" < p > and "end tag" </ p >. The text content of the element, if any ...
In 1991, the first documented official version of HTTP was written as a plain document, less than 700 words long, and this version was named HTTP/0.9, which supported only GET method, allowing clients to only retrieve HTML documents from the server, but not supporting any other file formats or information upload. [2]
Plain text files are almost universal in programming; a source code file containing instructions in a programming language is almost always a plain text file. Plain text is also commonly used for configuration files, which are read for saved settings at the startup of a program. Plain text is used for much e-mail. A comment, a ".txt" file, or a ...
Accept: text/html: Permanent RFC 9110: Accept-Charset: Character sets that are acceptable. Accept-Charset: utf-8: Permanent RFC 9110: Accept-Datetime: Acceptable version in time. Accept-Datetime: Thu, 31 May 2007 20:35:00 GMT: Provisional RFC 7089: Accept-Encoding: List of acceptable encodings. See HTTP compression. Accept-Encoding: gzip ...
Only "text/plain" was initially supported. [19] The other model detects when one of the non-simple features are requested and sends a pre-flight request [ 20 ] to the server to negotiate the feature.
Only a few higher-numbered codes can be created using entity names, but all can be created by decimal number character reference. Character entity references can also have the format &name; where name is a case-sensitive alphanumeric string. For example, "λ" can also be encoded as λ in an HTML document.
Dynamic HTML, or DHTML, is a term which was used by some browser vendors to describe the combination of HTML, style sheets and client-side scripts (JavaScript, VBScript, or any other supported scripts) that enabled the creation of interactive and animated documents.
The HTML layout engines in modern web browsers perform DOCTYPE "sniffing" or "switching", wherein the DOCTYPE in a document served as text/html determines a layout mode, such as "quirks mode" or "standards mode". The text/html serialization of HTML5, which is not SGML-based, uses the DOCTYPE only for mode selection. Since web browsers are ...