Because this project main goal is to provide storage classes and mapping/event functionality for DTCollectionViewManager and DTTableViewManager, you should probably first read, why those two frameworks exist in the first place. This is described, for example, in Why document of DTCollectionViewManager.
The goal of storage classes is to provide datasource models for UITableView/UICollectionView. Let's take UITableView, for example. It's datasource methods mostly relates on following:
Storage protocol builds upon those elements to define common interface for all storage classes.
SupplementaryStorage protocol extends
Storage to provide methods on supplementary models / headers/ footers.
Here are five
Storage implementations provided by
DTModelStorage and links to detailed documentation on them:
Please note, that all five storages support the same interface for handling supplementary models - supplementary providers. You can read more about them in dedicated document.
EventReaction classes are a part of mapping system between data models and reusable views. You can read about how they are used and why in DTCollectionViewManager Mapping document as well as DTCollectionViewManager Events document