OpenCities Map has the ability to open and display the contents of a MicroStation design file as if they were features. This is done through a mechanism called Dynamic Feature Scoring (DFS) which identifies or flags elements as features without actually making changes to the elements. This makes non-feature (MicroStation) data available for use with OpenCities Map, but sit also increases the time it takes to open a design file.
DFS is on by default and results in the words "Inferred Feature" when you hover your mouse over an element. To turn DFS off, set MS_GEOXFM_NO_DYNAMICSCOREDFEATURES = 1. The element is then identified the same as MicroStation.
Note 1: Enabling this variable will inhibit some OpenCities Map functionality, specifically the export tool in the Interoperability dialog (e.g. SHP export), the Map Manager, the Data Browser. In order to use those parts of OpenCities Map, the elements need to be seen as features.
Note 2: For disabling this variable, this variable should be undefined (%undef MS_GEOXFM_NO_DYNAMICSCOREDFEATURES) or removed.. Setting the value on 0, is not sufficient to disable it.