Data exchange between different systems or disciplines is a common requirement. To preserve data integrity during data exchange use Bentley i-model technology to provide model fidelity and provenance. The Integrated Civil i-Model (ICM) enhances this fidelity using Bentley i-model file format (i.dgn) with an embedded Civil Model (icm.dgn). The Civil Model uses a schema that includes the geometric makeup of the civil model and can be accessed by other applications using Bentley Design Sync software development kit (SDK). The schema in conjunction with the Design Sync API provides compatibility for round trip modification and differencing.