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Canonical link element. A canonical link element is an HTML element that helps webmasters prevent duplicate content issues in search engine optimization by specifying the "canonical" or "preferred" version of a web page. It is described in RFC 6596, which went live in April 2012. [1][2]
HTML 4 is an SGML application conforming to ISO 8879 – SGML. [19] April 24, 1998 HTML 4.0 [20] was reissued with minor edits without incrementing the version number. December 24, 1999 HTML 4.01 [21] was published as a W3C Recommendation. It offers the same three variations as HTML 4.0 and its last errata [22] were published on May 12, 2001 ...
HTML. Cascading Style Sheets (CSS) is a style sheet language used for specifying the presentation and styling of a document written in a markup language such as HTML or XML (including XML dialects such as SVG, MathML or XHTML). [1] CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.
HTML. 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. The current de facto standard is governed ...
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.
CSS HTML Validator (previously named CSE HTML Validator) is an HTML editor and CSS editor for Windows (and Linux when used with Wine) that helps web developers create syntactically correct and accessible HTML / HTML5, XHTML, and CSS documents by locating errors, potential problems like browser compatibility issues, and common mistakes.
HTML. A link relation is a descriptive attribute attached to a hyperlink in order to define the type of the link, or the relationship between the source and destination resources. The attribute can be used by automated systems, or can be presented to a user in a different way. In HTML these are designated with the rel attribute on link, a, or ...
The holy grail is a web page layout which has multiple equal-height columns that are defined with style sheets. It is commonly desired and implemented, but for many years, the various ways in which it could be implemented with available technologies all had drawbacks. [1] Because of this, finding an optimal implementation was likened to ...