Re: Resolving the issue of JSON and preserving order

JSON-LD is required to represent W3C Verifiable Credentials.

By default JSON-LD does not preserve array order.

https://www.w3.org/TR/json-ld11/#representing-lists-as-arrays

CBOR is not a solution to meeting the normative requirements of W3C
Verifiable Credentials... since CBOR Maps are not conforming documents.

IMO CBOR is a better building block, but that's not the question being
asked.

OS


On Thu, Sep 28, 2023 at 5:54 AM Anders Rundgren <
anders.rundgren.net@gmail.com> wrote:

> The example in the link shows individual claims with multiple keys.  Such
> claims must either be canonicalized (or wrapped in B64), in order to be
> signed or hashed.
>
> Deterministic CBOR does not require any special handling of data to be
> signed.
>
> Anders
>
> On Sat, Sep 23, 2023, 10:10 Andy Miller <theafmiller@gmail.com> wrote:
>
>> Since order is maintained in JSON arrays, I think this would maintain the
>> order of credential subjects (ref:
>> https://www.w3.org/TR/vc-data-model-2.0/#example-specifying-multiple-subjects-in-a-verifiable-credential
>> ):
>>
>> {"credentialSubject": [
>>     {"id": "id-1"},
>>     {"id": "id-2"}
>> ]}
>>
>> Andy
>>
>> On Sat, Sep 23, 2023 at 4:57 PM Anders Rundgren <
>> anders.rundgren.net@gmail.com> wrote:
>>
>>> Another solution is using deterministic CBOR which seems like an
>>> excellent fit for credentials and such.
>>> Deterministic CBOR will most likely become and IETF standard.
>>>
>>> https://github.com/cyberphone/D-CBOR#example
>>>
>>> Anders
>>>
>>> On 2023-09-22 14:38, Orie Steele wrote:
>>> > You can use JSON-LD language features to preserve order.
>>> >
>>> > If you use SD-JWT, because the JSON is signed instead of N-Quads,
>>> order is preserved by the signature.
>>> >
>>> > OS
>>> >
>>> > On Fri, Sep 22, 2023, 4:57 AM ステファニー タン（SBIホールディングス） <
>>> tstefan@sbigroup.co.jp <mailto:tstefan@sbigroup.co.jp>> wrote:
>>> >
>>> >     Hi all,
>>> >
>>> >     It's Stefannie again. Once again I would like to thank everyone
>>> for their help so far. We would be happy to participate in the next weekly
>>> call to introduce ourselves properly.
>>> >
>>> >     Our next question is to do with VC and establishing a certain
>>> order. Inside the VC is the proof and other attributes, such as Credential
>>> Subject. Since JSON is unordered or does not preserve a certain order, what
>>> do you do when you want to establish a certain order for multiple
>>> credential subjects while preserving extensibility?
>>> >
>>> >     Thank you for any advice or suggestion you might have.
>>> >
>>> >     Best,
>>> >     Stefannie
>>> >
>>>
>>>
>>>

-- 


ORIE STEELE
Chief Technology Officer
www.transmute.industries

<https://transmute.industries>