[x3d-public] ECMAScript (JavaScript) language support for X3D

Sat Jun 6 23:55:06 PDT 2020

On 6/4/2020 12:31 AM, John Carlson wrote:
> I also saw that JSON was standardized by ISO.  See:
> 
> https://www.iso.org/standard/71616.html

Dated 2017.

ISO reference [7] below includes JSON and is dated 2018, so that takes precedence.

X3D is an ISO/IEC spec so we always list other ISO/IEC specs first, based on ISO rules.

ISO has been closely tracking with ECMA for a number of years now.  ECMA has liaison status so it is an additional layer of formal review that occurs.

> Good news!

Yes

>  Can we progress without a standardized schema?

Why sure.  Validation is never a requirement for operation, it is "merely" exceptionally valuable to tell whether something is correct or not.

I personally don't think further work on X3D JSON is worthwhile on that until we get JSON validation capabilities.  What we have now seems to work for all cases, so further refinements will depend on such testing.  YMMV.

> John
> 
> On Thu, Jun 4, 2020 at 2:28 AM John Carlson <yottzumm at gmail.com <mailto:yottzumm at gmail.com>> wrote:
> 
>     I saw internationalization for ECMAScript in your included image.  Very important!
> 
>     John
> 
>     On Wed, Jun 3, 2020 at 8:15 AM Don Brutzman <brutzman at nps.edu <mailto:brutzman at nps.edu>> wrote:
> 
>         As we start exploring potential upgrade to X3D Scene Access Interface (SAI) for ECMAScript (JavaScript), it is good to establish expectations for support.
> 
>         Summary recommendation: we should use latest version for best compatibility and future stability.
> 
>         This will be an agenda item Friday for X3D Working Group, let's discuss to ensure complete clarity, then enter a Mantis issue for planned X3D specification updates.
> 
>         References of interest follow, all freely available:
> 
>         [0] X3D Graphics Standards Relationships
>         https://www.web3d.org/specifications/X3dSpecificationRelationships.png
>         https://www.web3d.org/specifications/X3dSpecificationRelationships.pdf
> 
>         [1] X3D Architecture, 29.4.1 Script
>         https://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/scripting.html#Script
> 
>         "Browsers are not required to support any specific language. Detailed information on scripting languages is described in 29.2 Concepts. Browsers supporting a scripting language for which a language binding is specified shall adhere to that language binding (see _ISO/IEC 19777_)."
> 
>         [2] X3D Architecture, 29.2.1 Overview
>         https://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/scripting.html#ScriptingOverview
> 
>         "This clause describes the general mechanisms and semantics of all scripting access. _2.[I19775-2]_ defines a set of abstract scripting services and specific languages bound to those services."
> 
>         TODO editorial erratum: inconsistent referencing style
> 
>         [3] X3D Abstract : Scene Access Interface (SAI), ISO/IEC 19775-2:2015
>               Clause 7 Conformance and minimum support requirements
>         https://www.web3d.org/documents/specifications/19775-2/V3.3/Part02/conformance.html
> 
>         [4] X3D Language Bindings : ECMAScript (JavaScript)
>               ISO/IEC CD 19777-1:201x, Edition 2, v3.3
>         https://www.web3d.org/documents/specifications/19777-1/V3.3/index.html
> 
>         [5] X3D Language Bindings : ECMAScript (JavaScript), 2 Normative references
>               I16262 - ISO/IEC 16262:2011 Information technology — ECMAScript language specification
>         https://www.web3d.org/documents/specifications/19777-1/V3.3/Part1/references.html
> 
>         [6] ISO/IEC 16262:2011
>               Information technology — Programming languages, their environments and system software interfaces — ECMAScript language specification
> 
>         "This standard has been revised by ISO/IEC 22275:2018"
> 
>         [7] ISO/IEC 22275:2018
>               Information technology — Programming languages, their environments, and system software interfaces — ECMAScript® Specification Suite
>         https://www.iso.org/standard/73002.html
> 
>               The electronic version of this International Standard can be downloaded from the ISO/IEC Information Technology Task Force (ITTF) web site.
>         http://isotc.iso.org/livelink/livelink/fetch/2000/2489/Ittf_Home/PubliclyAvailableStandards.htm
>         https://standards.iso.org/ittf/PubliclyAvailableStandards/c073002_ISO_IEC_22275_2018.zip
>               (10 pages long)
> 
>         "The following Standards constitute the current ECMAScript Specification Suite (see Figure 1)"
> 
>         * ECMA-262, ECMAScript® Language Specification
>         * ECMA-402, ECMAScript® Internationalization API Specification
>         * ISO/IEC 21778, Information technology — The JSON data interchange syntax [Adoption of ECMA-404]
> 
>         Attached: Figure 1 — Components of the ECMAScript Specification Suite Standard
> 
>         [8] Standard ECMA-262 - Ecma International
>         https://www.ecma-international.org/publications/standards/Ecma-262.htm
>               10th edition (June 2019)
> 
>         "Standard ECMA-262. This Standard defines the ECMAScript 2019 general-purpose programming language. Kindly note that the normative copy is the HTML version; the PDF version has been produced to generate a printable document. This 10th edition has been prepared under the Ecma RF patent policy."
> 
>         Gosh, that was easy wasn't it...
> 
>         As ever, all comments welcome.  Have fun with X3D and JavaScript!   8)
> 
>         all the best, Don
>         -- 
>         Don Brutzman  Naval Postgraduate School, Code USW/Br brutzman at nps.edu <mailto:brutzman at nps.edu>
>         Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
>         X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman
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> 

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 http://faculty.nps.edu/brutzman