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Re: [Json] JSON Schema Language, Draft 01

Anders Rundgren <anders.rundgren.net@gmail.com> Mon, 01 July 2019 08:20 UTC

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To: Ulysse Carion <ulysse@segment.com>, JSON WG <json@ietf.org>
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From: Anders Rundgren <anders.rundgren.net@gmail.com>
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Date: Mon, 01 Jul 2019 10:20:23 +0200
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Subject: Re: [Json] JSON Schema Language, Draft 01
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Hi Ulysse,
Since you are asking for feedback...

https://tools.ietf.org/html/draft-json-schema-language-01#section-3.3.3
"Type"
The lack of support for common numeric types such as byte, int64, double etc. IMHO makes JCL fairly limited and unsuitable for code generation for languages like Java and C#.

thanx,
Anders


On 2019-06-29 21:00, Ulysse Carion wrote:
> Hi all,
> 
> I wanted to provide an update on working tooling I've built on top of the latest draft of JSON Schema Language. I believe the ease with which such tooling can be written can be seen as an important reason why a minimal schema language for JSON is useful.
> 
> I've made a code generator (jsl-codegen), a schema inference tool (jsl-infer), and a test data generator / fuzzer (jsl-fuzz). They're all open-source and available here:
> 
> * https://github.com/json-schema-language/jsl-codegen
> * https://github.com/json-schema-language/jsl-infer
> * https://github.com/json-schema-language/jsl-fuzz
> 
> The jsl-codegen tool supports Java, Golang, and TypeScript. It's similar to protoc in the gRPC world, or the OpenAPI code generator tools.
> 
> The final tool, jsl-fuzz, is similar to the "json-generate" feature in the CDDL tool in:
> 
> https://www.rfc-editor.org/rfc/rfc8610.html#appendix-F
> 
> jsl-infer can be seen as the inverse of jsl-fuzz.
> 
> The small size of the JSL spec means that making tooling like this is rather trivial. jsl-infer and jsl-fuzz are 350 and 150 LOC, respectively.
> 
> I'm curious if folks have thoughts / criticisms on this tooling?
> 
> Regards,
> Ulysse
> 
> On Thu, Jun 6, 2019 at 8:04 PM Ulysse Carion <ulysse@segment.com <mailto:ulysse@segment.com>> wrote:
> 
>     Oh wait, another big change -- I got rid of the URI-based reference stuff. Thanks to Tim Bray for pointing out it's kind of needlessly complex.
> 
>     On Thu, Jun 6, 2019 at 5:18 PM Ulysse Carion <ulysse@segment.com <mailto:ulysse@segment.com>> wrote:
> 
>         Hi folks,
> 
>         Working off discussion in this mailing list, I've published a draft -01 of JSON Schema Language:
> 
>         https://tools.ietf.org/html/draft-json-schema-language-01
> 
>         Notable changes are the addition of "timestamp" (RFC3339) as a type, as well as the addition of enums. The syntax of JSL is now defined mostly through CDDL, and an informative appendix maps some JSL schemas to CDDL ones. The rest of the changes mostly serve to make the spec easier to read and implement, nothing dramatic.
> 
>         Would love feedback! What more should be removed or added to move this forward?
> 
>         Best,
>         Ulysse
> 
> 
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