Extensible markup language data in an extensible markup language (such as XML) is associated with a schema file for defining data types and data type definitions for applying data to the document. A map is prepared that relates that any extensible markup data applied to the document back to corresponding elements or attributes defined in the associated schema file. When the document is imported into a spreadsheet application grid, the data map is parsed to find XPATHs which determine the location, data types and user data for each cell or list object in the document related to the schema file. The cells and lists are populated with the extensible markup data and user data, and rendered according to formatting dictated by the extensible markup data applied to the document. The document may be exported such that the extensible markup data is maintained for subsequent import and use.