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  2. Help:Wikitext - Wikipedia

    en.wikipedia.org/wiki/Help:Wikitext

    An example of hidden comments This won't be visible except in "edit" mode. --> Another way to include a comment in the wiki markup uses the {} template, which can be abbreviated as {}. This template "expands" to the empty string, generating no HTML output; it is visible only to people editing the wiki source.

  3. Help:HTML in wikitext - Wikipedia

    en.wikipedia.org/wiki/Help:HTML_in_wikitext

    <u> was presentational element of HTML that was originally used to underline text; this usage was deprecated in HTML4 in favor of the CSS style {text-decoration: underline}. [4] In HTML5, the tag reappeared but its meaning was changed significantly: it now "represents a span of inline text which should be rendered in a way that indicates that ...

  4. Template:Code - Wikipedia

    en.wikipedia.org/wiki/Template:Code

    When used inline with regular text, {{code}} generally looks best and is easiest to read when it is explicitly spaced apart from the regular text: foo &nbsp; {{code | bar baz}} &nbsp; quux. is well spaced: foo bar baz quux. versus: foo {{code | bar baz}} quux. which is less visually clear: foo bar baz quux.

  5. Wikipedia:Tagging pages for problems - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Tagging_pages...

    For example: you are concerned about an article with 27 inline citations, but they're all from the same source. The {{unreferenced}} tag says the article has 0 references. Don't use the unreferenced tag on that article! {} might be okay, but the best tag for this situation is {}. When you have a choice of two tags, one that says kind of what ...

  6. Help:Template - Wikipedia

    en.wikipedia.org/wiki/Help:Template

    The most common method of inclusion is called transclusion, where the wiki source of the target page contains a reference to the template, using the {{Template name}} syntax. Another method is substitution, where the content of the template is copied into the wiki source of the target page, just once, when it is saved.

  7. CSS - Wikipedia

    en.wikipedia.org/wiki/CSS

    To demonstrate specificity Inheritance Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate. Inheritance is the mechanism by which properties are applied not only to a specified element but also to its descendants. Inheritance relies on the document tree, which is the hierarchy of XHTML elements in a page based on nesting. Descendant elements may ...

  8. Canonical link element - Wikipedia

    en.wikipedia.org/wiki/Canonical_link_element

    Search engines try to utilize canonical link definitions as an output filter for their search results. If multiple URLs contain the same content in the result set, the canonical link URL definitions will likely be incorporated to determine the original source of the content.

  9. Abstract syntax tree - Wikipedia

    en.wikipedia.org/wiki/Abstract_syntax_tree

    An abstract syntax tree (AST) is a data structure used in computer science to represent the structure of a program or code snippet. It is a tree representation of the abstract syntactic structure of text (often source code) written in a formal language.