Format-specific Credential Issuer Metadata: `order` not well-defined

[danielfett]

For the W3C credentials, order is currently defined as follows:

An array of the claim name values that lists them in the order they should be displayed by the Wallet.

How is that supposed to work with nested claims in credentialSubject? Is this supposed to just list the claim names (ignoring hierarchy)? What about collisions?

[Sakurann]

list top level claim names (no hierarchy) is probably the simplest. not sure what is meant by collisions, within the same credential type, there should not be collisions for top level claim names