Methods and systems are provided for importing markup language formatted data into a spreadsheet document and for exporting markup language formatted data from a spreadsheet document. XML data is associated with an XML schema file defining XML data types and data type definitions for applying XML data to the document. An XML data map is prepared that relates that any XML data applied to the document back to corresponding XML 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 in the imported spreadsheet document of XML data and the user entered data. Each XPATH is executed to determine the location, data types and user data for each cell or list object in the document that is related back to the associated schema file. The cells and lists are populated with the XML data and user data, and the data is rendered in the spreadsheet according to the formatting dictated by the XML data applied to the spreadsheet in association with the XML schema file. After an imported document has been edited, or after a document is created to include the application of XML data in association with a selected XML schema file, the document may be exported such that the XML data applied to the document is maintained for subsequent import and use of the document.