Finding:

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   HTML

   Published as Request for Comments 1866, HTML 2.0 included ideas from the HTML and HTML+ drafts. ... This metadata usually includes the MIME type (e.g. text/html or application/xhtml+xml) and the character encoding (see Character encodings in HTML).
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   XHTML

   XHTML 1.0 Strict is the equivalent to strict HTML 4.01, and includes elements and attributes that have not been marked deprecated in the HTML 4.01 specification.
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   HTML 5

   The ideas behind HTML 5, originally referred to as Web Applications 1.0, were pioneered in 2004 by the Web Hypertext Application Technology Working Group (WHATWG); HTML 5 incorporates Web Forms 2.0, another WHATWG standard.
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   HTML element

   The title element must not contain any nested tags (that is, it cannot contain any other elements). ... Includes another HTML document in the page.
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   List of XML and HTML character entity references

   The "Standard" column indicates the first version of XML that includes the entity. ... In the table below, the HTML built-in character entities are listed.
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   Unicode

   Note that MES-2 includes every character in MES-1 and WGL-4. ... Although syntax rules may affect the order in which characters are allowed to appear, both HTML 4 and XML (including XHTML) documents, by definition, comprise characters from most of the Unicode code points, with the exception of:
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   Christian Universalism

   The specific nature of the afterlife (literal versus metaphoric heaven and hell, purgatory, reincarnation, other ideas). ... http://sigler.org/kingdom/page1.html
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   History of virtual learning environments 1990s

   These ideas later become the foundation for CourseInfo. ... ↑ http://web.archive.org/web/19980612224457/www.madduck.com/wcbinfo/features.html
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   Unicode and HTML

   No additional metadata mechanisms are required for these encodings since the byte-order mark includes all of the information necessary for processing applications. ... HTML
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    HTML-Kit

    It includes internal, external, server-side and live preview modes; FTP Workspace for uploading, downloading and online editing of files ... HTML editors

Explore the following pages on Powerset:

• HTML,
• XHTML,
• HTML 5,
• HTML element,
• List of XML and HTML character entity references,
• Unicode,
• Christian Universalism,
• History of virtual learning environments 1990s,
• Unicode and HTML,
• HTML-Kit