To update property values based on another page in Pega, which method should be used?

The correct method to update property values based on another page in Pega is through a data transform. Data transforms are specifically designed to copy, modify, or set property values efficiently, allowing for the mapping of data between different pages or structures.

When you use a data transform, you can define the source and target properties, making it straightforward to pull values from one page and apply them to another. This supported functionality is essential when working with complex applications where data may reside across multiple objects or pages. Data transforms also provide a user-friendly way to access and manipulate values without delving deeply into logic, thus promoting better maintainability and clarity within the application.

While property set is a way to assign values to properties, it typically operates within the same page or local context, lacking the capability to pull from another page dynamically. Activities can also facilitate more complex interactions and manipulation of data but may not be as efficient or intuitive for straightforward property updates as data transforms are. Data pages serve a different purpose, primarily used for retrieving and displaying data rather than updating property values in response to another page.