The Active Topology feature supports two modes: Selection Based and Query Based.

Selection Based Active Topology Mode

Selection Based mode allows you to control the active/inactive status of individual elements. This is typically done using the Active Topology Selection Tool.

Query Based Active Topology Mode

Query Based mode allows you to use queries to control the active/inactive status of elements. For example, you can define queries that look at Year Installed/Year Retired to determine the active status.