[x3d-public] Future of X3DJSONLD—SAI, not DOM

[John Carlson]

On review, perhaps a better name is X3DSALID?

Tossed?

John

On Sat, Mar 25, 2023 at 8:10 PM John Carlson <yottzumm at gmail.com> wrote:

> X3DJSONLD will move towards being implemented not in DOM, but with an SAI
> Factory—instead of calling DOM document and element methods, SAI methods
> will be called.   SAI will replace JSON schema in all current uses of JSON
> schema for validating JSON, which may reduce schema download time.   I
> believe Factory will consume less download time.   Plus, if files are
> validated prior to being placed in production, maybe no validation is
> required (good for optimized sites).
>
> If anyone thinks this is horrible, let me know.   One problem is that
> validation code paths will be different between DOM and SAI?  Or is DOM
> implemented with SAI currently?   Thanks!
>
> X3DJSONLD was intended to handle SVG JSON and HTML JSON, so unless someone
> creates those in SAI, I will split away from the DOM product towards
> something native to X3D.   I’ll call it X3DSAILD, as an umbrella term.
> For X3DOM and X_ITE, this means migrating from JSONParser.js to
> JSONConverter.js.   If someone want to provide hooks into X3D SAI for those
> projects, that would be cool.
>
> One can suggest which binding should be used first.   I suggest a non-HTML
> browser.   The first step will be creating an SAI factory, if createNode is
> not supported.  Primarily, i will look for SAI implementations.  Anyone?
>
> I think that JSON schema will probably not be standardized by anyone.
> Hence the move to a standardized interface like SAI.   If anyone has some
> insight into standardization, let me know.
>
> Current pathI am following are:  1) creating an  “X3Dautoclass” factory
> module similar to bindings on top of X3DJSAIL, for implementation of
> createNode, if not present.
>
> Discussion of why we need JSON schema in addition to SAI are welcome.   I
> can already run validation on the archive.  JSON schema is not going away.
>   Indeed, more support for JSON schema in native environments is welcome.
> If that environment doesn’t support SAI, but supports DOM, X3DJSONLD may be
> indicated.
>
> I know that Doug suggested that JSON->XML suggested a separate process for
> conversion.  Also, Michalis has suggested that view3dscene converts to
> XML.  Is something more like JSON to XML preferred for those environments?
>   What kinds of validation is required for XML in those environments?
> —
> An attempt will be made to support Navigation.info as a string.
> Currently,  some of the string is trimmed.  One can see this during
> validation, I believe.  No decision has been made between array or string
> at this point.
>
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