API Reference > imodeljs-backend > iModels iModels Classes for working with iModels. See the learning article. Classes Name Description AutoPush Use AutoPush to automatically push local changes to a specified IModel. Beta BackendActivityMonitor An implementation of AppActivityMonitor that should be suitable for most backends. Beta BriefcaseDb A local copy of an iModel from iModelHub that can pull and potentially push changesets. BriefcaseManager Manages downloading Briefcases and downloading and uploading changesets. ChangeSummaryManager Class to extract Change Summaries for a briefcase. Beta ConcurrencyControl ConcurrencyControl enables an app to coordinate local changes with changes that are being made by others to an iModel. Beta ExportGraphicsMeshVisitor * Iterator to walk the facets of an ExportGraphicsMesh and present them to the world as if visiting a Polyface. IModelCloneContext The context for transforming a source Element to a target Element and remapping internal identifiers to the target iModel. Beta IModelDb An iModel database file. 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 SnapshotDb A snapshot iModel database file that is used for archival and data transfer purposes. StandaloneDb Standalone iModels are read/write files that are not managed by iModelHub. TemplateModelCloner IModelTransformer that clones the contents of a template model. Beta TxnManager Manages local changes to a BriefcaseDb or StandaloneDb via Txns Enumerations Name Description AutoPushEventType Identifies an AutoPush event. Beta AutoPushState Identifies the current state of an AutoPush object. Beta BriefcaseIdValue Deprecated TxnAction Deprecated Global Functions Name Description setMaxEntitiesPerEvent Strictly for tests. Interfaces Name Description AppActivityMonitor Monitors backend activity. Beta AutoPushParams Configuration for AutoPush. Beta ChangeSummary Represents an instance of the ChangeSummary ECClass from the ECDbChange ECSchema Beta ChangeSummaryExtractOptions Options for ChangeSummaryManager.extractChangeSummaries. Beta CheckpointProps Properties of a checkpoint ComputedProjectExtents The result of IModelDb.computeProjectExtents. ComputeProjectExtentsOptions Options supplied to IModelDb.computeProjectExtents. CreateChangeSummaryArgs Options for ChangeSummaryManager.createChangeSummaries. Beta ExportGraphicsInfo Info provided to ExportGraphicsFunction about graphics. ExportGraphicsLines A collection of line segments, suitable for direct use with graphics APIs. ExportGraphicsMesh A triangulated mesh with unified indices, suitable for direct use with graphics APIs. ExportGraphicsOptions Parameters for IModelDb.exportGraphics ExportLinesInfo Info provided to ExportLinesFunction about linework graphics. ExportPartDisplayInfo Information about the base display properties when a GeometryPart was ExportPartGraphicsOptions Parameters for IModelDb.exportPartGraphics ExportPartInfo Info provided to ExportPartFunction about graphics. ExportPartInstanceInfo Information about references to GeometryPart elements found during ExportPartLinesInfo Info provided to ExportPartFunction about line graphics. IModelImportOptions Options provided to the IModelImporter constructor. Beta IModelTransformOptions Options provided to the IModelTransformer constructor. Beta InstanceChange Represents an instance of the InstanceChange ECClass from the ECDbChange ECSchema Beta TxnChangedEntities Describes a set of Elements or Models that changed as part of a transaction. UpdateModelOptions Options for IModelDb.Models.updateModel ValidationError An error generated during dependency validation. Namespaces Name Description ConcurrencyControl Beta ExportGraphics Provides utility functions for working with data generated by IModelDb.exportGraphics IModelDb Type Aliases Name Description AutoPushEventHandler BriefcaseId The Id assigned to a briefcase by iModelHub, or BriefcaseIdValue.Unassigned . ExportGraphicsFunction ExportLinesFunction ExportPartFunction ExportPartLinesFunction ProgressFunction RequestNewBriefcaseArg The argument for BriefcaseManager.downloadBriefcase TxnIdString A string that identifies a Txn. Last Updated: 29 November, 2022