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<title>Relevant Standards - Apache HTTP Server Version 2.4</title>
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<p>This page documents all the relevant standards that the
    Apache HTTP Server follows, along with brief descriptions.</p>

<p>In addition to the information listed below, the following resources
    should be consulted:</p>

<ul>
      <li>
        <a href="https://www.skrb.org/ietf/http_errata.html">
        https://www.skrb.org/ietf/http_errata.html</a> - HTTP/1.1 Specification Errata
      </li>
      <li>
        <a href="https://www.rfc-editor.org/errata.php">
        https://www.rfc-editor.org/errata.php</a> - RFC Errata
      </li>
      <li>
        <a href="https://httpwg.org/specs/">
        https://httpwg.org/specs/</a> - A pre-compiled list
        of HTTP related RFCs
      </li>
    </ul>

<div class="warning"><h3>Notice</h3>
    <p>This document is not yet complete.</p>
    </div>

</div>
<div id="quickview"><ul id="toc"><li><img alt="" src="../../images/down.gif"> <a href="#http_recommendations">HTTP Recommendations</a></li>
<li><img alt="" src="../../images/down.gif"> <a href="#html_recommendations">HTML Recommendations</a></li>
<li><img alt="" src="../../images/down.gif"> <a href="#authentication">Authentication</a></li>
<li><img alt="" src="../../images/down.gif"> <a href="#language_country_codes">Language/Country Codes</a></li>
</ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../../images/up.gif"></a></div>
<div class="section">
<h2 id="http_recommendations">HTTP Recommendations <a title="Permanent link" href="#http_recommendations" class="permalink">&para;</a></h2>

<p>Regardless of what modules are compiled and used, Apache as a
    basic web server complies with the following IETF recommendations:</p>

<dl>
      <dt><a href="https://www.rfc-editor.org/rfc/rfc1945">RFC 1945</a>
      (Informational)</dt>

<dd>The Hypertext Transfer Protocol (HTTP) is an application-level
      protocol with the lightness and speed necessary for distributed,
      collaborative, hypermedia information systems.  This documents
      HTTP/1.0.</dd>

<dt><a href="https://www.rfc-editor.org/rfc/rfc2616">RFC 2616</a>
      (Standards Track)</dt>

<dd>The Hypertext Transfer Protocol (HTTP) is an
      application-level protocol for distributed, collaborative,
      hypermedia information systems.  This documents HTTP/1.1.</dd>

<dt><a href="https://www.rfc-editor.org/rfc/rfc2396">RFC 2396</a>
      (Standards Track)</dt>

<dd>A Uniform Resource Identifier (URI) is a compact string of
      characters for identifying an abstract or physical resource.</dd>

<dt><a href="https://www.rfc-editor.org/rfc/rfc4346">RFC 4346</a>
      (Standards Track)</dt>

<dd>The TLS protocol provides communications security over the
      Internet.  It provides encryption, and is designed to prevent
      eavesdropping, tampering, and message forgery.</dd>
    </dl>

</div><div class="top"><a href="#page-header"><img alt="top" src="../../images/up.gif"></a></div>
<div class="section">
<h2 id="html_recommendations">HTML Recommendations <a title="Permanent link" href="#html_recommendations" class="permalink">&para;</a></h2>

<p>Regarding the Hypertext Markup Language, Apache complies with
    the following IETF and W3C recommendations:</p>

<dl>
      <dt><a href="https://www.rfc-editor.org/rfc/rfc2854">RFC 2854</a>
      (Informational)</dt>

<dd>This document summarizes the history of HTML development,
      and defines the "text/html" MIME type by pointing to the relevant
      W3C recommendations.</dd>

<dt><a href="http://www.w3.org/TR/html401">HTML 4.01 Specification</a>
      (<a href="http://www.w3.org/MarkUp/html4-updates/errata">Errata</a>)
      </dt>

<dd>This specification defines the HyperText Markup Language (HTML),
      the publishing language of the World Wide Web. This specification
      defines HTML 4.01, which is a subversion of HTML 4.</dd>

<dt><a href="http://www.w3.org/TR/REC-html32">HTML 3.2 Reference
      Specification</a></dt>

<dd>The HyperText Markup Language (HTML) is a simple markup language
      used to create hypertext documents that are portable from one
      platform to another. HTML documents are SGML documents.</dd>

<dt><a href="http://www.w3.org/TR/xhtml11/">XHTML 1.1 -
      Module-based XHTML</a>
      (<a href="http://www.w3.org/MarkUp/2009/xhtml11-2nd-edition-errata.html">Errata</a>)
      </dt>

<dd>This Recommendation defines a new XHTML document type
      that is based upon the module framework and modules defined in
      Modularization of XHTML.</dd>

<dt><a href="http://www.w3.org/TR/xhtml1">XHTML 1.0 The
      Extensible HyperText Markup Language (Second Edition)</a>
      (<a href="http://www.w3.org/2002/08/REC-xhtml1-20020801-errata/">Errata</a>)
      </dt>

<dd>This specification defines the Second Edition of XHTML 1.0,
      a reformulation of HTML 4 as an XML 1.0 application, and three
      DTDs corresponding to the ones defined by HTML 4.</dd>
    </dl>

</div><div class="top"><a href="#page-header"><img alt="top" src="../../images/up.gif"></a></div>
<div class="section">
<h2 id="authentication">Authentication <a title="Permanent link" href="#authentication" class="permalink">&para;</a></h2>

<p>Concerning the different methods of authentication, Apache
    follows the following IETF recommendations:</p>

<dl>
      <dt><a href="https://www.rfc-editor.org/rfc/rfc2617">RFC 2617</a>
      (Standards Track)</dt>

<dd>"HTTP/1.0", includes the specification for a Basic
      Access Authentication scheme.</dd>

</dl>

</div><div class="top"><a href="#page-header"><img alt="top" src="../../images/up.gif"></a></div>
<div class="section">
<h2 id="language_country_codes">Language/Country Codes <a title="Permanent link" href="#language_country_codes" class="permalink">&para;</a></h2>

<p>The following links document ISO and other language and country
    code information:</p>

<dd>ISO 639 provides two sets of language codes, one as a two-letter
      code set (639-1) and another as a three-letter code set (this part
      of ISO 639) for the representation of names of languages.</dd>

<dd>These pages document the country names (official short names
      in English) in alphabetical order as given in ISO 3166-1 and the
      corresponding ISO 3166-1-alpha-2 code elements.</dd>

<dt><a href="https://www.rfc-editor.org/rfc/bcp/bcp47.txt">BCP 47</a>
      (Best Current Practice),
      <a href="https://www.rfc-editor.org/rfc/rfc3066">RFC 3066</a></dt>

<dd>This document describes a language tag for use in cases where
      it is desired to indicate the language used in an information
      object, how to register values for use in this language tag,
      and a construct for matching such language tags.</dd>

<dt><a href="https://www.rfc-editor.org/rfc/rfc3282">RFC 3282</a>
      (Standards Track)</dt>

<dd>This document defines a "Content-language:" header, for use in
      cases where one desires to indicate the language of something that
      has RFC 822-like headers, like MIME body parts or Web documents,
      and an "Accept-Language:" header for use in cases where one wishes
      to indicate one's preferences with regard to language.</dd>
    </dl>

</div></div>
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