[x3d-public] Minutes of the X3D WG Meeting 1st June 2016 > MIME-type

[Don Brutzman]

Thanks Doug, good ideas, in some cases all taken care of:

http://www.web3d.org/wiki/index.php/X3D_MIME-Type#15._Other_Information.2FGeneral_Comment
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x3d-vrml files are encoded using utf-8.

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 rationale. The MIME types and file extensions were changed to indicate this modified standard.

     Content Sub-types

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 plain text VRML-encoded file format would use the extension ".x3dv", and if compressed using GZIP uses the extension ".x3dvz".
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and

X3D Scene Authoring Hints: Encodings
http://www.web3d.org/x3d/content/examples/X3dSceneAuthoringHints.html#Encodings

I suppose HelloWorld.x3d.zip might work unaltered when served, but since the .zip extension implies that a directory archive might be there (rather than a single file), we would need to do a little more specification additions to handle it.


On 6/13/2016 5:29 AM, doug sanden wrote:
>> MIME  page (http://www.web3d.org/wiki/index.php/X3D_MIME-Type) – review and update, particularly TODO: Deployment
>
> I don't know if you need to reserve it, but something like model/web3d+zip might be interesting to some, as a way to bundle resources and scene files in .zip like googleEarth kmz. Specs haven't been discussed.
>
> -Doug
>
>
> more..
> example possible web3dz format
> -.web3z >>>
> meta.xml  <startscene type="vrml" path="/vrml/start.wrl"/>
> /vrml   start.wrl protos.wrl inline.wrl
> /x3d
> /json
> /images
> /video
> /audio
> /other
> <<< .web3dz
>
> more..
> in freewrl I implemented a .x3z which I serve as MIMEtype model/x3d+zip and is limited to doc.x3d start scene. It works when the client has permission to write local files, and  permission to clean up those files after unzipping. The implementation uses libminizip in the client, and desktop zip utility to create the .zip file before renaming it to .x3z
> http://dug9.users.sourceforge.net/web3d/tests/zipped/2_x3d.x3z
>
>
>
>
>
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all the best, Don
-- 
Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu
Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman