[x3d-public] X3DJSONLD ... converts XML to JSON client side!

[Leonard Daly]

John,

It appears to me that your biggest/most-important request is to define a 
nice/simpler JSON encoding for X3D than the one currently being used. I 
am going to continue this discussion based on that assumption. If it is 
not the case, please clarify.

You have been working with this for quite some time. My experience is in 
general JSON, not necessarily the X3D flavor. Can you describe what is 
currently difficult or complex in the current X3D-Json flavor. There is 
no sense on redoing/revising what is currently working well. What I 
would like to understand is the top 3-5 difficult or messy conversion 
issues and what makes them messy.

Thanks,

Leonard Daly



> Because X3D JSON is very different from X3D XML.  They don’t map well 
> with standard methods.
>
> Yes, it will take a little more work to handle circular dependencies, 
> and all the extra variables in DOM.
>
> Are you proposing JSON.stringify(xmlDom)? I think that would generate 
> way to much data, and XMLSerializer would work better, but 
> XMLSerializer produces XML.  But that’s essentially what 
> DOM2JSONSerializer is, serializes DOM to X3D JSON.  Duh!
>
> The revolution here is that I can do it client side.  I already had 
> X3dToJson.xslt to do it server side. X3dToJson.xslt doesn’t work 
> client side, last I checked.
>
> I don’t think you’ve found the golden egg yet, Leonard, but see below.
>
> John
>
> I encourage you to propose an X3D JSON standard based on this to see 
> if it will fly.  Send some PROTO examples to the mailing list—believe 
> me, I tried.  The first step is to standardize X3D JSON, not find an 
> XML to JSON converter.  But to finalize the X3D JSON standard, we need 
> two implementations.  Now we have 2 implementations.
>
> Please proposed an X3D JSON standard that is simpler, PLEASE????
>
> Thanks!
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for 
> Windows 10
>
> *From: *Leonard Daly <mailto:Leonard.Daly at realism.com>
> *Sent: *Tuesday, March 20, 2018 11:30 AM
> *To: *x3d-public at web3d.org <mailto:x3d-public at web3d.org>
> *Subject: *Re: [x3d-public] X3DJSONLD ... converts XML to JSON client 
> side!
>
> John,
>
> I am wondering how this might differ from the following built-in 
> capabilities described below. What does your code do differently than 
> these built-in methods?
>
>
> XD is an (string) XML fragment, then this fragment can be inserted 
> into the DOM (either as part of the document of a separate sub-tree) using
>
> var parser = new DOMParser();
> var xmlDom = parser.parserFromString (XD, 'application/xml');
>
> [Ref: https://developer.mozilla.org/en-US/docs/Web/API/DOMParser]
>
> At this point xmlDom is a DOM tree, but not inserted into the HTML 
> document DOM.
>
> It is possible to go back to XML string using
>
> var S = new XMLSerializer();
> var xmlString = s.serializeToString (xmlDom);
>
> [Ref: https://developer.mozilla.org/en-US/docs/Web/API/XMLSerializer]
>
> There is the JSON.stringify method
>
> [Ref: 
> https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify 
> and 
> https://stackoverflow.com/questions/46880822/how-to-json-stringify-a-dom-element 
> - answer 1]
>
> There is at least one other GItHub project 
> (https://gist.github.com/sstur/7379870) that converts to/from JSON and 
> strings/DOM.
>
> Going from an internal object to JSON takes a little careful work to 
> make sure the tree is correctly handled and the code does not follow 
> the circular loops that are present in DOM.
>
>
> Leonard Daly
>
>
>
>     The X3D JSON Loader now converts XML to JSON client-side, for your
>     nefarious purposes!
>
>     https://coderextreme.net/X3DJSONLD/src/main/html/index.html
>
>     Enjoy loading!
>
>     John
>
>
>
>
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>
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>
> -- 
> *Leonard Daly*
> 3D Systems & Cloud Consultant
> LA ACM SIGGRAPH Past Chair
> President, Daly Realism - /Creating the Future/
>

-- 
*Leonard Daly*
3D Systems & Cloud Consultant
LA ACM SIGGRAPH Past Chair
President, Daly Realism - /Creating the Future/
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