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helpmate.sgml

cdata
(cdata value)
The CDATASection interface represents a CDATA section that can be used
within XML to include extended portions of unescaped text, such that the
symbols < and & do not need escaping as they normally do within XML when
used as text.
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comment
(comment value)
The Comment interface represents textual notations within markup; although
it is generally not visually shown, such comments are available to be read
in the source view. Comments are represented in HTML and XML as content
between '<!--' and '-->'. In XML, the character sequence '--' cannot be used
within a comment.
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doctype
(doctype value)
The <!DOCTYPE> declaration must be the very first thing in your HTML
document, before the <html> tag. The <!DOCTYPE> declaration is not an HTML
tag; it is an instruction to the web browser about what version of HTML the
page is written in. In HTML 4.01, the <!DOCTYPE> declaration refers to a
DTD, because HTML 4.01 was based on SGML. The DTD specifies the rules for
the markup language, so that the browsers render the content correctly.
HTML5 is not based on SGML, and therefore does not require a reference to a
DTD. Tip: Always add the <!DOCTYPE> declaration to your HTML documents, so
that the browser knows what type of document to expect.

Valid keyword shortcut values are shown below. If the value is a string
then that will be used instead.

  :html5
  :html-4.01-strict
  :html-4.01-transitional
  :html-4.01-frameset
  :xhtml-1.0-strict
  :xhtml-1.0-transitional
  :xhtml-1.0-frameset
  :xhtml-1.1
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