API Reference > imodeljs-backend > iModels > IModelDb > importSchemas importSchemas Method Import an ECSchema. On success, the schema definition is stored in the iModel. This method is asynchronous (must be awaited) because, in the case where this IModelDb is a briefcase, this method first obtains the schema lock from the iModel server. You must import a schema into an iModel before you can insert instances of the classes in that schema. See Element importSchemas(requestContext: ClientRequestContext, schemaFileNames: string[]): Promise<void> throws IModelError if the schema lock cannot be obtained or there is a problem importing the schema. note Changes are saved if importSchemas is successful and abandoned if not successful. see IModelDb.querySchemaVersion Parameter Type Description requestContext ClientRequestContext Context used for logging and authorization (if applicable) schemaFileNames string[] Returns - Promise<void> Defined in core/backend/src/IModelDb.ts Line 747 Last Updated: 29 November, 2022