Provides types and members for performing content export/import operations between SharePoint Foundation site collections. These types support deployment scenarios as well as content migration scenarios.
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.deployment.aspx
Programming Reference
Assembly: Microsoft.SharePoint.dll Namespace: Microsoft.SharePoint.Deployment
Important Objects:
SPExport - controls the Export process
SPExportSettings - used to configure the export process
SPExportObject - defines which objects need to be exported
SPImport - controls the import process
SPImportSettings - used to configure the import process