<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Calibri",sans-serif;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:709572894;
mso-list-type:hybrid;
mso-list-template-ids:-225283410 134807553 134807555 134807557 134807553 134807555 134807557 134807553 134807555 134807557;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoPlainText>Hi Don,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Here is a graphic of the JSON schema structure for IMPORT.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><span style='mso-fareast-language:EN-GB'><img width=507 height=288 style='width:5.2812in;height:3.0in' id="Picture_x0020_1" src="cid:image001.png@01D2C7F9.734324D0"></span><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>As you can see, it is an array, but an array of objects. This is also the structure listed in the draft JSON encoding at 4.3.2.15 (see <a href="http://www.web3d.org/documents/specifications/19776-5/V3.3/Part05/concepts.html#IMPORTPropertySyntax">http://www.web3d.org/documents/specifications/19776-5/V3.3/Part05/concepts.html#IMPORTPropertySyntax</a>). However, comparison is useful against the ROUTE statement, which is not an array, but an object. Here it is:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><span style='mso-fareast-language:EN-GB'><img border=0 width=295 height=318 style='width:3.0729in;height:3.3125in' id="Picture_x0020_2" src="cid:image002.png@01D2C7FA.9B490110"></span><o:p></o:p></p><p class=MsoPlainText>And the draft text is at <a href="http://www.web3d.org/documents/specifications/19776-5/V3.3/Part05/concepts.html#ROUTEPropertySyntax">http://www.web3d.org/documents/specifications/19776-5/V3.3/Part05/concepts.html#ROUTEPropertySyntax</a>. Now, note that the text talks about it being an optional property of some “-children” property arrays. So let us look at some of these:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><ul style='margin-top:0cm' type=disc><li class=MsoPlainText style='margin-left:0cm;mso-list:l0 level1 lfo1'>For the Scene object, the “-children” property (<a href="http://www.web3d.org/documents/specifications/19776-5/V3.3/Part05/concepts.html#SceneChildrenPropertySyntax">http://www.web3d.org/documents/specifications/19776-5/V3.3/Part05/concepts.html#SceneChildrenPropertySyntax</a>) includes ROUTE, IMPORT and EXPORT statements, among others.<o:p></o:p></li><li class=MsoPlainText style='margin-left:0cm;mso-list:l0 level1 lfo1'>For the Node object, the “-children” property, where it may optionally be added (<a href="http://www.web3d.org/documents/specifications/19776-5/V3.3/Part05/concepts.html#NodeChildrenPropertySyntax">http://www.web3d.org/documents/specifications/19776-5/V3.3/Part05/concepts.html#NodeChildrenPropertySyntax</a>) includes ROUTE, IMPORT and EXPORT, among others<o:p></o:p></li><li class=MsoPlainText style='margin-left:0cm;mso-list:l0 level1 lfo1'>Referring to the JSON schema, the “-children” definition, equivalent to nodes derived from X3DChildNode, includes ROUTE, IMPORT and EXPORT, among others.<o:p></o:p></li></ul><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thus I conclude that wherever an IMPORT or EXPORT statement can be used, is (unless I have missed something) always in the context of an MFNode field, or else as a direct child of the Scene statement. Hence it is already part of an array, and therefore does not need to be an array in its own right. Therefore, I propose to remove the array portion from the JSON schema definition, if everyone is in agreement.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thanks for spotting this and raising it.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>All the best,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Roy<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><span lang=EN-US style='mso-fareast-language:EN-GB'>-----Original Message-----<br>From: Don Brutzman [mailto:brutzman@nps.edu] <br>Sent: 08 May 2017 03:26<br>To: Roy Walmsley <roy.walmsley@ntlworld.com>; John Carlson <yottzumm@gmail.com><br>Cc: X3D Graphics public mailing list <x3d-public@web3d.org><br>Subject: JSON schema: type for IMPORT, EXPORT</span></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>x3d-3.3-JSONSchema.json says<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> "IMPORT": {<o:p></o:p></p><p class=MsoPlainText> "type": "array",<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> "EXPORT": {<o:p></o:p></p><p class=MsoPlainText> "type": "array",<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>but likely should be structured similarly to<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> "ROUTE": {<o:p></o:p></p><p class=MsoPlainText> "type": "object",<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Diagnostic: test scene X3dHeaderPrototypeSyntaxExamples.json attached, with excerpt:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>{ "IMPORT":<o:p></o:p></p><p class=MsoPlainText> {<o:p></o:p></p><p class=MsoPlainText> "@AS":"someInlineRoot",<o:p></o:p></p><p class=MsoPlainText> "@importedDEF":"someName",<o:p></o:p></p><p class=MsoPlainText> "@inlineDEF":"someInline"<o:p></o:p></p><p class=MsoPlainText> }<o:p></o:p></p><p class=MsoPlainText>},<o:p></o:p></p><p class=MsoPlainText>{ "PositionInterpolator":<o:p></o:p></p><p class=MsoPlainText> {<o:p></o:p></p><p class=MsoPlainText> "@DEF":"StayInPlace",<o:p></o:p></p><p class=MsoPlainText> "@key":[0,1],<o:p></o:p></p><p class=MsoPlainText> "@keyValue":[0,0,0,0,0,0]<o:p></o:p></p><p class=MsoPlainText> }<o:p></o:p></p><p class=MsoPlainText>},<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>all the best, Don<o:p></o:p></p><p class=MsoPlainText>-- <o:p></o:p></p><p class=MsoPlainText>Don Brutzman Naval Postgraduate School, Code USW/Br <a href="mailto:brutzman@nps.edu"><span style='color:windowtext;text-decoration:none'>brutzman@nps.edu</span></a><o:p></o:p></p><p class=MsoPlainText>Watkins 270, MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149<o:p></o:p></p><p class=MsoPlainText>X3D graphics, virtual worlds, navy robotics <a href="http://faculty.nps.edu/brutzman"><span style='color:windowtext;text-decoration:none'>http://faculty.nps.edu/brutzman</span></a><o:p></o:p></p></div></body></html>