[x3d-public] [x3d] Spec Comment by vmarchetti on 19776-1: XML Encoding - V3.3

[Joe D Williams]

Thank You Vincent,

At the bottom of the report, the lines showing improper coding was blank so here is example.

The sequence:
Transform DEF='BorderFlower01' .../
then
Transform DEF='FlowerSpecial' ...
Shape USE='BorderFlower01' /
/

Does not match ShapeChildContentModel
Contained node's relationship to its parent node is wrong,
Shape has no children so wrong containerfield for Transform.
Transform needs containerField=children
Shape is not a Grouping Node.


Thanks Again,
Joe
-----Original Message-----
From: Spec Feedback <spec-comment at web3d.org>
Sent: Jan 26, 2024 7:36 AM
To: <x3d at web3d.org>
Subject: [x3d] Spec Comment by vmarchetti on 19776-1: XML Encoding - V3.3

-- Submitter indicates that this comment may be public: *Yes* --

Comment on 19776-1: XML Encoding - V3.3
4.3.4
https://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/concepts.html#DEFAndUSEAttributeSyntax

-----------------
Recent posts to the X3D-Public mailing list have pointed out that there is a
discrepancy among browsers in how they handle the
DEF/USE statements if the XML elements in the XML encoding have disparate
names.
http://web3d.org/pipermail/x3d-public_web3d.org/2024-January/020212.html

I recommend the XML encoding spec be edited, in the next standard submission
cycle, to clarify that it is invalid for XML elements with different names
(i.e. encoding different X3D nodes) to have matching values of DEF/USE
attributes.)

Proposed wording to be added to what is now Section 4.3.4 of the 19776-1
document at version 3.3:
https://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/concepts.html#DEFAndUSEAttributeSyntax

Suggest adding this text:

-----------------------------------------------------------------------------
It is a validation error when an XML element with a DEF attribute matches
another element's USE attribute but has a different XML element name.

Example of invalid XML encoding:






____________________________________________________________________________

-----------------

Submitted on Friday, 2024, January 26 - 10:36am
by vmarchetti (Vincent Marchetti )
IP: 76.34.206.25

See: https://www.web3d.org/node/1694/submission/10124


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