@karimullaN Yes, Pega does support multiple layers of mapping through JSON mapping. In your example, you have three layers: Grand Parent, Parent, and Client, each mapped to a Page list. Pega allows mapping from one structure to another, and you can define these relationships within the data transform or when configuring JSON imports and exports. You can map the Grand Parent to a Page list, the Parent to another Page list, and finally, map the Historical Client to the Client Page list. The key is to properly define the hierarchy of data and the corresponding mappings in Pega’s JSON mapping configuration. This structure can be achieved using the Data Transform or Data Pages with appropriate mapping and class hierarchy setup.