What is a requirement for creating a hierarchy of repeating data elements in Pega?

To establish a hierarchy of repeating data elements in Pega, it is crucial to reference the same data class as the page list property being used. This is because creating a hierarchy implies that each instance of the repeating data structure (like a page list) is closely tied to a particular set of data properties that belong to a single class. By maintaining the same data class, you ensure that the properties and fields you're working with are consistent in structure and context, allowing for effective data management and manipulation.

When working with hierarchical structures, such as nested data elements or page lists within a page list, it’s important to ensure that they not only belong to the same data model but also maintain the integrity and relational context of the data. This approach strengthens the linkage between the parent and child data elements, making data retrieval and display easier within user interfaces. Furthermore, consistency simplifies rule definitions and data handling within the application.

The other options do not align with the requirement for creating such hierarchies. Referencing a different data class would lead to inconsistencies in data structure, using a static data element wouldn’t facilitate dynamic data manipulation needed in repeating data elements, and implementing a complex rule for data access could unnecessarily complicate the design and access to the repeating data hierarchy