The Why Precedence Rule Fired feature returns information that explains why a precedence rule fired. This information allows an application developer to debug how dimensions are displayed using precedence rules.

With the feature enabled in an application, the root dimension values that the MDEX Engine returns are augmented with additional dynamically generated properties. The properties provide information that describe how the precedence rule was triggered (explicitly or implicitly), which dimension ID and name triggered the precedence rule, and the type of precedence rule (standard, leaf, or default).