A dataset represents an Adobe Experience Platform object. Each dataset entity includes the following information:
Fields and their types
Creation or Modification dates and users
Child objects, such as file entities
A dataset can have both a flat schema and a hierarchical schema. Hierarchical schemas have complex objects and arrays. Data for hierarchical schemas, most common in XDM schemas, is in parquet file format. Data for a flat schema is in delimited file format.
When you create a source or target connection, you can select a source or target object from the list. After you select the object, you can view the columns for the selected object on the Fields tab.