The current card views are dependent on OCA and the Aries OCA style guide that is driven via display metadata encoded in the OCA package. This approach is well ahead of where other specifications are currently at.

There are a number of other display metadata (SD-JWT-VC, OID4VCI) and rendering solutions such as SVG or even PDF that do not align directly with the current design. There is overlap but also gaps including image_slice and overlay attributes. This was a particular challenge in adding openid4vc to the wallet without adding non-standard metadata attributes (openid4vci draft 15).

The goal of the refactoring is to make it easier to support different rendering models without changing current behaviour. See the attached diagram that tries to capture the current state of credential rendering.