When creating a Declare Expression, which element is NOT typically needed?

When creating a Declare Expression, a data page reference is not typically required. Declare Expressions are utilized in Pega to automatically compute values based on specific conditions without the need for manual intervention. The process involves defining certain elements that are crucial for their operation.

To create a Declare Expression, one must specify a source property, which is the property or properties from which the expression will derive its value. The target property is where the computed value is stored after the expression evaluates. Additionally, a condition for triggering can be established to control when the Declare Expression should be calculated, ensuring that it operates under the right circumstances.

In contrast, a data page reference is not a standard component in the configuration of a Declare Expression. While data pages can be used in various contexts within Pega for data retrieval, they are not a fundamental aspect of the Declare Expression mechanics. Hence, the absence of a data page reference is a characteristic feature of working with Declare Expressions. This distinction allows for simpler and more focused expressions that target specific properties directly.