[x3d-public] X3D XML DOCTYPE and Schema adjustments ScreenGroup and Mantis/spec issue for Layout

[John Carlson]

Related, but unrelated ticket:

https://sourceforge.net/p/x3d/tickets/37/


On Tue, Jul 29, 2025 at 1:53 AM John Carlson <yottzumm at gmail.com> wrote:

> Interesting and important.  I already proposed an X3DParentNode that all
> nodes with children, addChildren and removeChildren fields could inherit
> from.  And of course, X3DGroupingNode would inherit from X3DParentNode.
> X3DParentNode would inherit from X3DNode.
>
> I’m not sure such a tight hierarchy is needed.
>
> But I, too, would like to hear comments.
>
> John
> On Mon, Jul 28, 2025 at 11:41 PM Don Brutzman via x3d-public <
> x3d-public at web3d.org> wrote:
>
>> Found some small changes for XML Schema, DTD and specification during
>> X3DJSAIL model debugging.
>>
>> X3D DTD update activity:
>>> https://www.web3d.org/specifications/x3d-dtd-changelog.txt
>>> 28 JUL 2025, brutzman
>>> - (v3.2-4.0) add ScreenGroup to list of allowed GroupingNodes
>>
>>
>> X3D XML Schema update activity:
>>> https://www.web3d.org/specifications/x3d-schema-changelog.txt
>>> 28 JUL 2025, brutzman
>>> - (v3.2-4.0) add ScreenGroup to ChildContentModelFull group list of
>>> allowed GroupingNodes
>>> - (v3.2-4.0) note Mantis 1501 specification issue: LayoutGroup is
>>> X3DNode, not an X3DGroupingNode
>>
>>
>> Checking on corresponding changes revealed a mistaken node type in X3D
>> Architecture.
>>
>>    - Mantis 1501: LayoutGroup needs to be X3DNode, not X3DGroupingNode
>>    - https://mantis.web3d.org/view.php?id=1501
>>
>>  LayoutGroup needs to be X3DNode, not X3DGroupingNode
>>
>>
>> * X3D Architecture, clause 36 Layout component, 36.4.2 LayoutGroup
>>> *
>>> https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/components/layout.html#LayoutGroup
>>>
>>
>>     LayoutGroup : X3DGroupingNode {
>>
>>
>> However the spec prose also says
>>> * "The LayoutGroup is a grouping node whose children are related by a
>>> common layout within a parent layout. Thus, a LayoutGroup can only be a
>>> child of a LayoutLayer node or another LayoutGroup node."
>>
>>
>> Some fields of X3DGroupingNode are provided, but others are not.
>>
>>
>> A satisfactory replacement for X3DGroupingNode is X3DNode, which is less
>>> restrictive and not contradictory.
>>
>>
>> Change applied to draft spec for review purposes.
>>
>> 36.4.2 LayoutGroup
>>
>> LayoutGroup : X3DNode X3DGroupingNode {
>>
>>
>> Further review and comment welcome prior to eventual editors' review.
>>
>> all the best, Don
>> _______________________________________________
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>> x3d-public at web3d.org
>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>
>
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