There is a new version of Data Exchange Library (version 1.3) available with various improvements including these two new features:

• Introduced new annotation-based JSONDocument generator that creates a mapping for a standardized nested JSON document to read and write all data for a given collection of identifiers in a model.
• Introduced a new function dex::ResetMappingData() to empty all identifiers, sets, and reset counters used in a particular mapping.

In addition to existing row-based formats, the Data Exchange library can now also generate a (nested) document-based format on the basis of model annotations (see https://documentation.aimms.com/dataexchange/standard.html).

As the generated formats may not be exactly what you’re looking for, we have also outlined how you can modify or extend existing annotation-based formats, or create a completely custom format based on the existing ones.

See Data Exchange Library documentation and roadmap for more details.