Digital identity in the consumer space is about people and data. Identity, in and of itself, is not the issue it is how we present data to do a job that matters. The currently accepted way of designing an identity ecosystem for sharing data is via a platform architecture. This is often hard-coded to provide identities that respond to the calls of a relying party, Send me your age and I may grant you a bottle of whiskey and do it under my version of SAML 2″]
Source: https://www.csoonline.com/article/3305418/how-identity-layering-improves-data-flow.html