The following schemas are used with SpreadsheetML, an XML dialect useful for extracting information from Excel spreadsheets.
| Namespace | urn:schemas-microsoft-com:office:excel | 
|---|---|
| Description | This namespace defines elements and attributes used to describe more complex features of Excel, such as PivotTables, worksheet options, and validation. | 
| Prefix | x | 
| Friendly Name | XML Spreadsheet 2000 | 
| Namespace | urn:schemas-microsoft-com:office:spreadsheet | 
|---|---|
| Description | This namespace contains the elements and attributes related to basic spreadsheet functionality. | 
| Prefix | ss | 
| Friendly Name | XML Spreadsheet 2002 | 
| Namespace | http://schemas.microsoft.com/office/excel/2003/xml | 
|---|---|
| Description | This namespace contains functionality added in Microsoft Office Excel 2003, which mainly includes mapping XML. | 
| Prefix | x2 | 
| Friendly Name | XML Spreadsheet 2003 | 
| Namespace | uuid:C2F41010-65B3-11d1-A29F-00AA00C14882 | 
|---|---|
| Description | This namespace contains the data types that can be used for columns in PivotTables. | 
| Prefix | dt | 
| Friendly Name | Data Type | 
| Namespace | urn:schemas-microsoft-com:rowset | 
|---|---|
| Description | This namespace is used to describe the attibutes of the row element for PivotTables. | 
| Prefix | rs | 
| Friendly Name | Rowset | 
| Namespace | uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882 | 
|---|---|
| Description | This namespace contains elements and attributes which describe the row elements for PivotTables. | 
| Prefix | s | 
| Friendly Name | Rowset Definition | 
| Namespace | #RowsetSchema | 
|---|---|
| Description | This namespace provides a description of a generalized row element that is used as a model for validation purposes when using PivotTables. | 
| Prefix | z | 
| Friendly Name | Model Row | 
| Namespace | http://schemas.microsoft.com/data/udc | 
|---|---|
| Description | This namespace contains elements and attributes which describe Universal Data Connections that are used in Microsoft Office Excel 2003 to connect to external data sources. | 
| Prefix | udc | 
| Friendly Name | Universal Data Connection | 
| Namespace | http://schemas.microsoft.com/data/udc/soap | 
|---|---|
| Description | This namespace defines external data connections when using the SOAP protocol. | 
| Prefix | udcs | 
| Friendly Name | Universal Data Connection SOAP | 
| Namespace | http://schemas.microsoft.com/data/udc/xmlfile | 
|---|---|
| Description | This namespace defines only one element, File, which specifies the pathname of an XML file that is used by UDC. | 
| Prefix | udcxf | 
| Friendly Name | Universal Data Connection XML File | 
| Namespace | urn:schemas-microsoft-com:office:component:spreadsheet | 
|---|---|
| Description | This namespace supports the Office Web Component. | 
| Prefix | c | 
| Friendly Name | Office Web Component: Spreadsheet |