Abstract: A spreadsheet environment is utilized to interact with a multidimensional data store associated with the enterprise planning session. In general, a conventional spreadsheet application is extended to provide additional functionality for interacting with the multidimensional data store maintained by the enterprise planning system. Instances of the extended spreadsheet application execute on a client computing device, and present a user with a two-dimensional representation of a portion of the multidimensional data store. For example, the extended spreadsheet application may present user with a workbook that includes one or more worksheets within which the user may view and update his planning data. In this manner, the extended spreadsheet application functions as an interface between two-dimensional worksheets maintained by the computing devices and the multidimensional data store maintained by the enterprise planning system.