This topic discusses the interaction of dynamic refinement ranking with collapsible dimensions. The --dynrank_consider_collapsed Dgraph flag forces the MDEX Engine to consider intermediate collapsible dimension values as candidates for dynamic ranking.

By default, the MDEX Engine considers only leaf dimension values for dynamic ranking, removing all intermediate dimension hierarchy from consideration. With this default behavior, when a hierarchical dimension's mid-level values (all except the root and leaf values) are configured as collapsible in Developer Studio, and when the dimension is also set to use dynamic refinement ranking, the dimension collapses and displays only leaf values for all navigation queries. The mid-level dimension values are never displayed regardless of the number of leaf values present in the navigation state.

You can use the --dynrank_consider_collapsed flag to force the MDEX Engine to consider intermediate collapsible dimension values as candidates for dynamic ranking.