[x3d-public] JSON Schema meeting minutes

Tue Oct 26 17:27:03 PDT 2021

➢ The other thing we might do is restrict USE to nodes that appear with the USE field in X3DUOM.

OK, I haven’t looked at x3duom for this at this point, but if USE can be used with hanimdisplacer, then I think we have found a problem that connects with other nodes. How could json schema be different from x3d xml schema? The structure and content must be the same, yes?
Choose markup for structure and content in way that works same for all encodings, Please, because the content must be the same. 
How could I clear a json schema that does not exactly reflect the xml schema? 
I can certainly see allowing USE for the hanim Humanoid, Joint, Segment, and Site nodes for consistency, even though even though I still think this could not result in a “standard’ humanoid
Thanks,
Joe

From: John Carlson
Sent: Tuesday, October 26, 2021 12:10 AM
To: Joseph D Williams; Brutzman, Donald (Don) (CIV)
Cc: X3D Public Mailing List (x3d-public at web3d.org)
Subject: Re: [x3d-public] JSON Schema meeting minutes

The other thing we might do is restrict USE to nodes that appear with the USE field in X3DUOM.
John
On 10/25/21 10:03 PM, Joseph D Williams wrote:
Hi Don and All, 

1. The USE pattern we were working on in the X3D JSON Schema was common to all nodes,

Then I think this could result in patterns that are not ‘standard’ or acceptable or usable syntax. As I read the example for hanimdisplacer which sort of matches construction of an interpolator node it appeared that I could put a USE in there to reference another displacer, I guess in order to use the same points and displacements(?) as one already defined. Maybe I am reading it wrong but I still can’t think of any example of displacer or any other interpolator where a USE is appropriate. 

And, for hanim, I predict still no ‘standard’ humanoid is able to have a USE included in Joint, Segment, or Site nodes of a ‘standard’ skeleton, although contained nodes of those nodes may use previously defined stuffs.
So, is the USE really common to all nodes? If so, then I want extension to be able to USE just a field of another node, such as using a common key time sequence in a set of interpolators.  
Respectfully seeking the Universal Pattern(s) … 
All Best, 
Joe

From: Brutzman, Donald (Don) (CIV)
Sent: Monday, October 25, 2021 12:10 AM
To: Joseph D Williams; John Carlson
Cc: X3D Public Mailing List (x3d-public at web3d.org)
Subject: RE: [x3d-public] JSON Schema meeting minutes

Hi Joe.  The USE pattern we were working on in the X3D JSON Schema was common to all nodes, not just HAnim nodes.  So no change of functionality expected.

We are always striving for consistent expressive power for all the different language bindings and file encodings.

We have 3950 X3D Examples to test.  More are always welcome for the archives if you think that further coverage is needed of some capability.

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 https://faculty.nps.edu/brutzman

From: Joseph D Williams
Sent: Sunday, October 24, 2021 5:12 PM
To: John Carlson; Brutzman, Donald (Don) (CIV)
Cc: X3D Public Mailing List (x3d-public at web3d.org)
Subject: RE: [x3d-public] JSON Schema meeting minutes

Hi John, Getting this to work will help. Are you looking for examples to validate, beginning with a .x3d file? 
If I can include USE in the HanimDisplacer pt. then I can include USE as Interpolator key and value fields(?)
Including a USE in any of the HAnim… nodes Joints, Segments, Sites is not going to work unless, well, I can’t really see how it would work in a ‘standard’ humanoid.

Thanks,
Joe

From: John Carlson
Sent: Sunday, October 24, 2021 11:44 AM
To: Brutzman, Donald (Don) (CIV)
Cc: X3D Public Mailing List (x3d-public at web3d.org)
Subject: Re: [x3d-public] JSON Schema meeting minutes

Don, schema is here, python seems to be working with added metaschema checks.

https://github.com/coderextreme/X3DJSONLD/tree/master/src/main/schema

Next on agenda is bpy to JSON conversion, possibly with added GUI/X3D conversion tool.

John

Sent from my iPad

On Oct 18, 2021, at 5:09 PM, Brutzman, Donald (Don) (CIV) <brutzman at nps.edu> wrote:

John and I reviewed his latest schema today and discussed various design considerations.

His latest version, generated by a Python program reading X3DUOM, is found as follows:

1. https://github.com/coderextreme/X3DJSONLD/blob/master/src/main/schema/x3d-4.0-JSONSchema.json

Looking at the result in Firefox was helpful because that has a great way to look at JSON which allowed us to iconize/expand (fold/unfold) as needed.  Excerpt follows.

The result looks great.  One refinement John will handle: for nodes with a USE field, no -children nodes are permitted.

Once he has the next version, I will check it into the specifications directory (next to X3D XML Schema and XML DOCTYPE).

At that point we are ready to begin further validation efforts using multivarious tools against the many X3D examples in JSON, such as

2. https://savage.nps.edu/Savage/GroundVehicles/Jeep/Jeep.json

Testing without regex patterns is good for now.  A prior version had acceptable regex, so that appears to be do-able.

Having fun with X3D JSON!  8)

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 https:// faculty.nps.edu/brutzman

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20211026/c0af2d67/attachment.html>