Portability Policy Documents
Comments to the Federal Trade Commission submitted by the Data Transfer Project (2020)
The Data Transfer Project (DTP) is an open source project that uses services’ existing APIs and authorization mechanisms to access data. It then uses service specific adapters to transfer that data into a common format, and then back into the new service’s API.
To get a more in-depth understanding, this overview may help as well as documentation in the data-transfer-project repository.