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Re: [dataspace-dcp-dev] Discussion on the DCP Issuance Flow: Credential Issuance on the Basis of Another Credential
Hi Niklas,

This is one of the core use cases for DCP. The existing specification flows should allow this. As the sequence diagram demonstrates, this requires using the presentation flow within an issuance flow. The client (requesting party) knows which credentials are required via the Issuer Metadata API.

Am I missing something?

Jim





On Feb 23, 2026 at 11:35:01 AM, "Schulte, Niklas via dataspace-dcp-dev" <dataspace-dcp-dev@xxxxxxxxxxx> wrote:
Dear DCP Committers,

in regard to Issue #255 (https://github.com/eclipse-dataspace-dcp/decentralized-claims-protocol/issues/255), I would like to discuss my approach to support the presentation of an existing credential within the DCP Issuance Flow. I think this flow is essential for future automated data space onboardings and should be supported by the DCP (e.g. automatically issuing a data space membership credential on the basis of any existing VCs in the organization's wallet), especially in regard to the upcoming eIDAS 2.0 regulation. To this end, please take a look at the sequence diagram attached to this mail.

I am happy to either discuss my approach in a dedicated meeting with the DCP committers or within our next DCP weekly meeting. I would really appreciate your feedback on whether this is compatible with the current DCP Issuance and Presentation Flow.

Kind regards
Niklas

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