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Define registry inclusion rules #157

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Define registry inclusion rules #157

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Define registry inclusion rules
marcoscaceres Aug 7, 2024
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Update index.html
marcoscaceres Aug 13, 2024
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marcoscaceres Aug 13, 2024
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marcoscaceres Aug 13, 2024
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107 changes: 103 additions & 4 deletions index.html
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Expand Up @@ -388,9 +388,101 @@ <h2 id="protocol-registry">
<h3>
Inclusion criteria
</h3>
<aside class="note">
The below criteria are a work in progress and are likely to change as
this document evolves.
</aside>
<p>
To be included in the registry, the [=digital credential/exchange
protocol=]:
</p>
<ol>
<li>MUST be standardized at a <a href="https://www.w3.org/liaisons/">recognized standards development organization</a> and have
a stable URL.
</li>
<li>MUST define a [[WebIDL]] [=dictionary=] representation of the
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This seems like a good goal to me, but seems hard to accomplish logistically. Where does the WebIDL live? In this spec? In the protocol spec? What happens when they get out of sync?

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@marcoscaceres marcoscaceres Aug 7, 2024 •
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I was imagining the protocol spec. In our spec, we would only link to the dictionary (i.e., our spec would only have [FooBar](https:/link-to-whatever.com/spec/#FooBar)).

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It seems like it would be easier to include the definition in this spec as part of the inclusion process.

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It could certainly be done that way. I do share @samuelgoto’s concerns about this spec falling out of sync though.

I was thinking that having just the name of dictionary in this spec minimizes the chance of things getting out of sync. Listing just the name is also what the Cred Man spec does in its registry:

https://www.w3.org/TR/credential-management-1/#credential-type-registry-appropriate-interface-object

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Either would work, but we shouldn't require other specs that may already be completed to reopen themselves if they could just drop some webidl that describes themselves here. Particularly where they don't already define their structures with webidl.

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@marcoscaceres marcoscaceres Aug 13, 2024 •
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Yes, that's a good point. Someone can correct me, but I think the only candidates right now are OpendID4VP (and the mDoc part), and maybe W3C VC? I think all of those are in active development with the aim of integrating with this.

but we shouldn't require other specs that may already be completed to reopen themselves if they could just drop some webidl that describes themselves here.

Generally speaking, what I'm finding is that you can't take existing specs and expect them to work out of the box with the DC API. They really need to be developed in tandem because the Web and JS have very specific requirements. The IDL requirement, along with clearly specified validation criteria, is actually a forcing function for those specs to integrate properly with this spec.

My feeling right now is that they might need to reopen themselves if they want to integrate, because they wouldn't be designed to work with a JS API in the first place (and if any such spec exists).

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I expanded on my concerns about this specific requirement here on this other PR, but I remain fairly concerned (security-wise) about requiring all browsers to redeploy before protocols can be extended:

#156 (comment)

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Is it worth including a non-normative example?

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Certainly could, but if we can get one into OpenID, then that can serve as a good basis. Alternatively, we are going to specify that fake test protocol... so we could point to that too as an example.

[=digital credential/exchange protocol=] request structure (i.e., the
[=dictionary=] to which the {{DigitalCredentialsProvider}}'s
{{DigitalCredentialsProvider/request}} is [=converted to idl
values|converted=] to before it is passed onto underlying platform).
</li>
<li>MUST define a [[WebIDL]] [=dictionary=] representation of the
[=digital credential/exchange protocol=] response structure (i.e., the
[=dictionary=] to which the {{DigitalCredential}}'s
{{DigitalCredential/data}} is [=converted to idl values|converted=] before it
is made available to the relying party).
</li>
<li>MUST define validation rules for members of the request and response
structures.
</li>
<li>MUST have undergone privacy review by the W3C's Privacy Interest
Group and Federated Identity Working Group.
</li>
<li>MUST have undergone security review by the Federated Identity Working
Group.
</li>
Comment on lines +418 to +423
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Do we want to define the criteria by which this group would review those?

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Yes. I think so. I was hoping to let those folks chime in about how we might do it, as some are already members of this group.

<li>MUST have implementation commitment from at least two implementers in
independent browser engines, to meet the W3C's adequate implementation
experience requirements.
</li>
<li>MUST have formally recorded consensus by the Working Group to be
included in the registry.
</li>
</ol>
<p>
Once the above criteria are met, the protocol will be included in the
registry.
</p>
<h3>
Change process
</h3>
<p>
To be included in the registry...
To add a new [=digital credential/exchange protocol=] to the registry, or
to update an existing one:
</p>
<dl>
<dt>
Define a protocol identifier
</dt>
<dd>
The protocol identifier MUST be a unique string that is not already in
use in the registry. Use only lowercase ASCII letters, digits, and
hyphens (e.g., "protocol", "the-protocol"). Avoid using version numbers
in the protocol identifier.
</dd>
<dt>
Link to a Web IDL request dictionary
</dt>
<dd>
The <dfn>Web IDL request dictionary</dfn> MUST be a [=dictionary=] that
defines the structure of the request that is passed, via
{{DigitalCredentialsProvider}}'s
{{DigitalCredentialsProvider/request}}, to the holder's a digital
wallet.
</dd>
<dt>
Link to a Web IDL response dictionary
</dt>
<dd>
The <dfn>Web IDL response dictionary</dfn> MUST be a [=dictionary=]
that defines the structure of {{DigitalCredential}}'s
{{DigitalCredential/data}}.
</dd>
<dt>
Describe the protocol
</dt>
<dd>
The description MUST be a brief summary of the protocol's purpose and
use case.
</dd>
<dt>
Provide a link to the specification
</dt>
<dd>
The specification MUST be a stable URL that points to the authoritative
source for the protocol, including validation rules.
</dd>
</dl>
<aside class="issue" data-number="58"></aside>
<p>
[=User agents=] MUST support the following [=digital credential/exchange
Expand All @@ -404,13 +496,20 @@ <h3>
<thead>
<tr>
<th>
Protocol identifier
<dfn data-dfn-for="digital credentials registry">Protocol
identifier</dfn>
</th>
<th>
<dfn data-dfn-for="digital credentials registry">Web IDL request
dictionary</dfn>
</th>
<th>
Description
<dfn data-dfn-for="digital credentials registry">Web IDL response
dictionary</dfn>
</th>
<th>
Specification
<dfn data-dfn-for=
"digital credentials registry">Specification</dfn>
</th>
</tr>
</thead>
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