Configurable presentation/display parameters

[andrewhughes3000]

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• Presentation of a CR needs to be configurable without having to modify the underlying CR itself. For example, the displayed field names might be different from the CR stored field names.

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• A method to specify presentation parameters or hints so that CRs displayed can be customized appropriately. This might help with language localization issues as well.

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• n/a

Additional context
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• look at the datafund.io receipt generator approach - it has a parallel 'presentation/display' JSON that allows rewriting output
• look at Hyperledger Data Overlays as another possible approach