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<div id="siteNotice"><script type='text/javascript'>if (wgNotice != '') document.writeln(wgNotice);</script></div> <h1 class="firstHeading">X3D MIME-Type</h1>
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<h3 id="siteSub">From Web3D.org</h3>
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<p>The X3D Working Group is preparing a formal submission to the <a href="http://www.ietf.org" class="external text" title="http://www.ietf.org" rel="nofollow">Internet Engineering Task Force (IETF)</a> to support X3D Mime Types.
</p>
<table id="toc" class="toc" summary="Contents"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1"><a href="#Current_work_to_gain_final_MIME-type_approval"><span class="tocnumber">1</span> <span class="toctext">Current work to gain final MIME-type approval</span></a>
<ul>
<li class="toclevel-2"><a href="#References"><span class="tocnumber">1.1</span> <span class="toctext">References</span></a></li>
<li class="toclevel-2"><a href="#Work_list"><span class="tocnumber">1.2</span> <span class="toctext">Work list</span></a></li>
<li class="toclevel-2"><a href="#Submission_steps"><span class="tocnumber">1.3</span> <span class="toctext">Submission steps</span></a></li>
</ul>
</li>
<li class="toclevel-1"><a href="#Registration_application_for_X3D_MIME_type_.28draft.29"><span class="tocnumber">2</span> <span class="toctext">Registration application for X3D MIME type (draft)</span></a>
<ul>
<li class="toclevel-2"><a href="#1._Media_Type_Name:"><span class="tocnumber">2.1</span> <span class="toctext">1. Media Type Name:</span></a></li>
<li class="toclevel-2"><a href="#2._Subtype_names:"><span class="tocnumber">2.2</span> <span class="toctext">2. Subtype names:</span></a></li>
<li class="toclevel-2"><a href="#3._Required_parameters:"><span class="tocnumber">2.3</span> <span class="toctext">3. Required parameters:</span></a></li>
<li class="toclevel-2"><a href="#4._Optional_parameters:"><span class="tocnumber">2.4</span> <span class="toctext">4. Optional parameters:</span></a></li>
<li class="toclevel-2"><a href="#5._Encoding_considerations:"><span class="tocnumber">2.5</span> <span class="toctext">5. Encoding considerations:</span></a></li>
<li class="toclevel-2"><a href="#6._Security_considerations:"><span class="tocnumber">2.6</span> <span class="toctext">6. Security considerations:</span></a></li>
<li class="toclevel-2"><a href="#7._Interoperability_considerations:"><span class="tocnumber">2.7</span> <span class="toctext">7. Interoperability considerations:</span></a></li>
<li class="toclevel-2"><a href="#8._Published_specification:"><span class="tocnumber">2.8</span> <span class="toctext">8. Published specification:</span></a></li>
<li class="toclevel-2"><a href="#9._Applications_that_use_this_media_type:"><span class="tocnumber">2.9</span> <span class="toctext">9. Applications that use this media type:</span></a></li>
<li class="toclevel-2"><a href="#10._Additional_information:"><span class="tocnumber">2.10</span> <span class="toctext">10. Additional information:</span></a></li>
<li class="toclevel-2"><a href="#11._Intended_usage:"><span class="tocnumber">2.11</span> <span class="toctext">11. Intended usage:</span></a></li>
<li class="toclevel-2"><a href="#12._Other_Information.2FGeneralComment:"><span class="tocnumber">2.12</span> <span class="toctext">12. Other Information/GeneralComment:</span></a></li>
<li class="toclevel-2"><a href="#13._Person_to_contact_for_further_information:"><span class="tocnumber">2.13</span> <span class="toctext">13. Person to contact for further information:</span></a></li>
</ul>
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</p>
<a name="Current_work_to_gain_final_MIME-type_approval"></a><h2> <span class="mw-headline"> Current work to gain final MIME-type approval </span></h2>
<p>In 1997 the Internet Engineering Task Force (IETF) approved <a href="http://www.ietf.org/rfc/rfc2077.txt?number=2077" class="external text" title="http://www.ietf.org/rfc/rfc2077.txt?number=2077" rel="nofollow">IETF RFC 2077</a> for the Model MIME type.
This supports VRML and establishes a MIME basis for other 3D model formats.
However, the IETF has not yet approved X3D as an official MIME type, primarily due our incomplete prior efforts which did not submit a formal final application.
This page is where we are building that formal application for official status of the X3D MIME-Type.
</p><p>The current round of work started in 2008 with an initial application submission late that year.
Review comments were received from IETF MIME-Type task force, reconciled and incorporated back into the application in February 2009.
This effort was reported and collected as <a href="http://www.ietf.org/mail-archive/web/ietf-types/current/msg00766.html" class="external text" title="http://www.ietf.org/mail-archive/web/ietf-types/current/msg00766.html" rel="nofollow">Registration of media type model/x3d+XXX</a>.
</p><p>The updated document appears below. All edits need to be done in conformance with the current application standard. When completed, the application needs to be sent to 'ietf-types@iana.org' with the subject line "Registration of media type model/x3d+XXX" included.
</p>
<a name="References"></a><h4> <span class="mw-headline"> References </span></h4>
<ul><li> IANA <a href="http://www.iana.org/cgi-bin/mediatypes.pl" class="external text" title="http://www.iana.org/cgi-bin/mediatypes.pl" rel="nofollow">MIME Type Submission Form</a>
</li><li> IETF <a href="http://tools.ietf.org/html/rfc2077.txt?number=2077" class="external text" title="http://tools.ietf.org/html/rfc2077.txt?number=2077" rel="nofollow">RFC 2077, The Model Primary Content Type for Multipurpose Internet Mail Extensions</a>
</li><li> IETF <a href="http://tools.ietf.org/html/rfc3023" class="external text" title="http://tools.ietf.org/html/rfc3023" rel="nofollow">RFC 3023, XML Media Types</a>
</li><li> IETF <a href="http://tools.ietf.org/html/rfc4288" class="external text" title="http://tools.ietf.org/html/rfc4288" rel="nofollow">RFC 4288, Media Type Specifications and Registration Procedures (Publication Requirements)</a>
</li></ul>
<ul><li> ISO 19776-1 X3D XML encoding, <a href="http://www.web3d.org/files/specifications/19776-1/V3.2/Part01/concepts.html#FileExtensionAndMIMETypes" class="external text" title="http://www.web3d.org/files/specifications/19776-1/V3.2/Part01/concepts.html#FileExtensionAndMIMETypes" rel="nofollow">4.4.1 File extension and MIME types</a>
</li><li> ISO 19776-2 ClassicVrml encoding, <a href="http://www.web3d.org/files/specifications/19776-2/V3.2/Part02/concepts.html#ClassicVRMLEncodedX3DFilesAndWWW" class="external text" title="http://www.web3d.org/files/specifications/19776-2/V3.2/Part02/concepts.html#ClassicVRMLEncodedX3DFilesAndWWW" rel="nofollow">4.4.1 File extension and MIME type</a>
</li><li> ISO 19776-3 Compressed binary encoding, <a href="http://www.web3d.org/files/specifications/19776-3/V3.2/Part03/concepts.html#FileExtensionsAndMIMETypes" class="external text" title="http://www.web3d.org/files/specifications/19776-3/V3.2/Part03/concepts.html#FileExtensionsAndMIMETypes" rel="nofollow">4.5.2 File extensions and MIME types</a>
</li></ul>
<ul><li> Web3D <a href="http://www.web3d.org/x3d/learn/mimetypes" class="external text" title="http://www.web3d.org/x3d/learn/mimetypes" rel="nofollow">X3D MIME Types and File Extensions</a>
</li></ul>
<a name="Work_list"></a><h4> <span class="mw-headline"> Work list </span></h4>
<ul><li> Ensure that the application is fully complete
<ul><li> Confirm correct use of conjunction with sub-type (+xml, -vrml)
</li><li> Revise Section 5, Encoding considerations to update the binary encoding to current state
</li><li> Develop Section 6, Security Considerations
</li><li> Update Section 9, Applications that use this media type
</li><li> Update Section 10, Additional information
</li><li> Update Section 11, Intended Usage
</li><li> Update all X3D specification references to the latest version and description
</li><li> Resolve all TODO items
</li></ul>
</li><li> Perform public review on <a href="http://www.web3d.org/x3d/publiclists" class="external text" title="http://www.web3d.org/x3d/publiclists" rel="nofollow">x3d-public@web3d.org mailing list</a>
</li><li> Gain approval of <a href="http://www.web3d.org/realtime-3d/working-groups/x3d" class="external text" title="http://www.web3d.org/realtime-3d/working-groups/x3d" rel="nofollow">X3D Working Group</a> and concurrence of <a href="http://www.web3d.org/realtime-3d/about/board" class="external text" title="http://www.web3d.org/realtime-3d/about/board" rel="nofollow">Web3D Board of Directors</a>
</li></ul>
<a name="Submission_steps"></a><h4> <span class="mw-headline"> Submission steps </span></h4>
<ul><li> Review the IETF <a href="http://www.iana.org/cgi-bin/mediatypes.pl" class="external text" title="http://www.iana.org/cgi-bin/mediatypes.pl" rel="nofollow">MIME Type Submission</a> references
</li><li> Finalize application details that follow
</li><li> Submit to IETF and follow up on any resulting actions or approvals
</li></ul>
<p>Our goal is make this submission during May 2012.
</p>
<hr />
<a name="Registration_application_for_X3D_MIME_type_.28draft.29"></a><h2> <span class="mw-headline"> Registration application for X3D MIME type (draft) </span></h2>
<p><i>Editors note: XML, ClassicVRML, and Binary responses merged together. In the end, three separate applications will need to be created. See <a href="http://tools.ietf.org/html/rfc3023" class="external text" title="http://tools.ietf.org/html/rfc3023" rel="nofollow">RFC 3023, XML Media Types</a> for requirements specific to XML media types.</i>
</p>
<a name="1._Media_Type_Name:"></a><h3> <span class="mw-headline">1. Media Type Name:</span></h3>
<p>Model
</p>
<a name="2._Subtype_names:"></a><h3> <span class="mw-headline">2. Subtype names:</span></h3>
<p>Standards Tree
</p>
<ul><li> x3d+xml
</li><li> x3d-vrml
</li><li> x3d+fastinfoset
</li></ul>
<a name="3._Required_parameters:"></a><h3> <span class="mw-headline">3. Required parameters:</span></h3>
<p>None
</p>
<a name="4._Optional_parameters:"></a><h3> <span class="mw-headline">4. Optional parameters:</span></h3>
<p>None
</p>
<a name="5._Encoding_considerations:"></a><h3> <span class="mw-headline">5. Encoding considerations:</span></h3>
<p>This application represents the different MIME types used for three different encodings of the X3D ISO standard (see [1]). The standard defines an abstract information structural representation, for which several file formats are available. These formats are currently defined to be:
</p>
<ul><li> XML: '8-bit text'
</li><li> ClassicVRML: '8-bit text'
</li><li> Compressed Binary: 'binary'
</li></ul>
<a name="6._Security_considerations:"></a><h3> <span class="mw-headline">6. Security considerations:</span></h3>
<p><i>Editors note: This needs to be rewritten to address the questions and statements in <a href="http://tools.ietf.org/html/rfc4288#section-4.6" class="external text" title="http://tools.ietf.org/html/rfc4288#section-4.6" rel="nofollow">RFC 4288, Media Type Specifications and Registration Procedures (Security Requirements)</a>. </i>
</p><p><i>Specifically we need to address/state response for</i>
</p>
<ul><li> Complex media types
</li><li> Active content
</li><li> Release of information
</li><li> Decompression issues
</li><li> External security considerations
</li></ul>
<p><i>Scripting is defined as being available for the specification. Two languages are defined: Java and ECMAScript. Each scripting language is controlled by its local security model. As the content may run in many different situations, the X3D specification does not impose specific security policies. For example, some standalone applications will want to directly interact with the local file system, network or database, while others that run in a web browser would use the web-browser's security model.</i>
</p>
<a name="7._Interoperability_considerations:"></a><h3> <span class="mw-headline">7. Interoperability considerations:</span></h3>
<p>The definition of the file format is maintained by the <a href="http://www.web3d.org" class="external text" title="http://www.web3d.org" rel="nofollow">Web3d Consortium</a> and published through the ISO process. Several revisions of the specification have been made and it continues to be made. All revisions use the same MIME type definitions, and are backwards compatible internally and structurally. In addition, each of the file format encodings may be losslessly transformed between each other.
</p><p>There are no known interoperability issues. There are existing applications that run on PC, Macintosh, and Unix/Linux systems that work with the file format. The Web3D Consortium makes an effort to keep the file format interoperable across all platforms.
</p>
<a name="8._Published_specification:"></a><h3> <span class="mw-headline">8. Published specification:</span></h3>
<p>See <a href="http://tools.ietf.org/html/rfc4288#section-4.10" class="external text" title="http://tools.ietf.org/html/rfc4288#section-4.10" rel="nofollow">RFC 4288, Media Type Specifications and Registration Procedures (Publication Requirements)</a> for detailed instructions.
All revisions of the X3D specification is maintained online at
<a href="http://www.web3d.org/realtime-3d/specification/all" class="external free" title="http://www.web3d.org/realtime-3d/specification/all" rel="nofollow">http://www.web3d.org/realtime-3d/specification/all</a>
The most recent specification is available from the ISO website (for a fee) or from Web3D Consortium
</p>
<ul><li> <a href="http://www.web3d.org/files/specifications/19776-1/V3.2/index.html" class="external text" title="http://www.web3d.org/files/specifications/19776-1/V3.2/index.html" rel="nofollow">ISO/IEC 19776-1.2:2009 - XML Encoding</a>
</li><li> <a href="http://www.web3d.org/files/specifications/19776-2/V3.2/index.html" class="external text" title="http://www.web3d.org/files/specifications/19776-2/V3.2/index.html" rel="nofollow">ISO/IEC 19776-2.2:2008 - ClassicVRML Encoding</a>
</li><li> <a href="http://www.web3d.org/files/specifications/19776-3/V3.2/index.html" class="external text" title="http://www.web3d.org/files/specifications/19776-3/V3.2/index.html" rel="nofollow">ISO/IEC 19776-3:2007 - Compressed Binary Encoidng</a>
</li></ul>
<a name="9._Applications_that_use_this_media_type:"></a><h3> <span class="mw-headline">9. Applications that use this media type:</span></h3>
<p>The applications that use (or would use) the
</p>
<ul><li> model/x3d+xml
</li><li> model/x3d-vrml
</li><li> model/x3d+fastinfoset
</li></ul>
<p>media type are those that display, create, edit, import, or export 3D model content using the X3D standard. A short list of the applications include:
</p>
<ul><li> BS Contact (Bitmanagement)
</li><li> Instant Reality (Fraunhofer)
</li><li> X3D-Edit and X3D Validator (Naval Postgraduate School)
</li><li> Blender
</li><li> <i>Maya exporter</i>
</li><li> <i>TODO</i>
</li></ul>
<a name="10._Additional_information:"></a><h3> <span class="mw-headline">10. Additional information:</span></h3>
<ul><li> XML Encoding
<ul><li> Magic number(s): Use XML's specification
</li><li> File extension: '.x3d'
</li><li> Macintosh File Type Code(s): <i>TODO</i>
</li><li> Object Identifier(s): <i>TODO</i>
</li></ul>
</li></ul>
<ul><li> ClassicVRML Encoding
<ul><li> Magic number(s): #X3D
</li><li> File extension: '.x3dv'
</li><li> Macintosh File Type Code(s): <i>TODO</i>
</li><li> Object Identifier(s): <i>TODO</i>
</li></ul>
</li></ul>
<ul><li> Compressed Binary Encoding
<ul><li> Magic number(s): <i>TODO</i>
</li><li> File extension: '.x3db'
</li><li> Macintosh File Type Code(s): <i>TODO</i>
</li><li> Object Identifier(s): <i>TODO</i>
</li></ul>
</li></ul>
<a name="11._Intended_usage:"></a><h3> <span class="mw-headline">11. Intended usage:</span></h3>
<p>COMMON
</p>
<a name="12._Other_Information.2FGeneralComment:"></a><h3> <span class="mw-headline">12. Other Information/GeneralComment:</span></h3>
<p><i>Editors note: It is not clear what should (or needs) to go in this section. The text below is what was previously here.</i>
</p><p>The X3D standard is a continuation of the VRML standard that is defined in RFC2077. As part of this work, several large modifications were made to the file format and specification. The basic premise for the specification continues the VRML design rational. The MIME types and file extensions were changed to indicate this modified standard.
</p>
<ol><li> Content Sub-types
</li></ol>
<p>Each content type may have an additional Content-Encoding to indicate whether the content has been compressed using GZIP in addition to the basic textual encoding. This is also indicated by modifying each file extension with the character "z". For example, the plaintext VRML-encoded file format would use the extension ".x3dv", and if compressed using GZIP uses the extension ".x3dvz"
</p>
<a name="13._Person_to_contact_for_further_information:"></a><h3> <span class="mw-headline">13. Person to contact for further information:</span></h3>
<ul><li> Name: Leonard Daly (X3D Working Group Co-Chair)
</li><li> E-mail: <use appropriate alias>
</li><li> Author / Change controller: The Web3D Consortium
</li></ul>
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