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This section gives examples of diagnostics generated by the markup validation service, and suggests possible fixes. Diagnostics are by line and column of the generated HTML for the page. It may be helpful to obtain the HTML in order to understand the diagnostic. For example, if you using the Firefox browser, you can type control-U to see the HTML.
<dl></dl>, an HTML element used for a definition list; Deep learning, a field of machine learning; Description logics, a family of knowledge representation languages; Delete Line (ANSI), an ANSI X3.64 escape sequence; Digital library, a library in which collections are stored in digital formats; Diode logic, a logic family using diodes
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.
HTML5 uses a DOCTYPE declaration which is very short, due to its lack of references to a DTD in the form of a URL or FPI. All it contains is the tag name of the root element of the document, HTML. [10] In the words of the specification draft itself: <!DOCTYPE html>, case-insensitively.
HTML element content categories. 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 ...
HTML attributes are special words used inside the opening tag to control the element's behaviour. It is a piece of markup language used to adjust the behavior or display of an HTML element.HTML attributes are a modifier of a HTML element type. An attribute either modifies the default functionality of an element type or provides functionality to ...
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Markdown Extra is a lightweight markup language based on Markdown implemented in PHP (originally), Python and Ruby. [39] It adds the following features that are not available with regular Markdown: Markdown markup inside HTML blocks; Elements with id/class attribute "Fenced code blocks" that span multiple lines of code; Tables [40] Definition ...