API Reference > core-transformer > All core-transformer Classes Name Description IModelExporter Base class for exporting data from an iModel. Beta IModelExportHandler Handles the events generated by IModelExporter. Beta IModelImporter Base class for importing data into an iModel. Beta IModelTransformer Base class used to transform a source iModel into a different target iModel. Beta PendingReferenceMap a map that supports using PendingReferences objects as structural keys, TemplateModelCloner IModelTransformer that clones the contents of a template model. Beta Enumerations Name Description TransformerLoggerCategory Logger categories used by this package Interfaces Name Description IModelImportOptions Options provided to the IModelImporter constructor. Beta IModelTransformOptions Options provided to the IModelTransformer constructor. Beta OptimizeGeometryOptions Options provided to IModelImporter.optimizeGeometry specifying post-processing optimizations to be applied to the iModel's geometry. Beta Last Updated: 19 August, 2022