The server-side data import framework API has two distinct uses.
Extend data import framework
The data import framework Models are defined by plugins around a key object, such as a user or person. One plugin will declare the model exists, and then other plugins extend the model to describe the data they manage.
Readers can be implemented to import new file formats.
Use framework for importing data
Other plugins can use the data import framework for importing data, using the same server-side API as the batch import, User sync and REST API. This enables custom data import processes to be implemented with very small amounts of code.
As well as the core data import framework concepts, the API uses these terms:
Input files are converted into Records by a Reader. This is implemented as a function which calls an iterator with every row from an input file.
Transformations control ingesting data from a single record, which is transformed via Destinations into Targets. These Targets may then be committed to save them into the databases.