title: Add Cell Metadata in Excel using OpenXml
body: <p>I have a scenario, where I want to add meta data to individual cells in Excel(.xslx) file. While going through Cell class in Open XML, I found that there are provision to store metadata for cell.</p>
  
  <p>Refer : <a href="http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.cell.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.cell.aspx</a>.</p>
  
  <p>There are two attributes "cm" and "vm" which contains the index of the respective metadata.
  How can I use these attributes using OpenXml to add metadata to cell. Excel file containing cell metadata or the code can help.</p>
  
  <p>Update:
  Please refer the below link : <a href="http://social.technet.microsoft.com/Forums/office/en-US/c7f9747a-1d03-4415-97d4-d9aa58b4d240/bug-in-excels-handling-of-metadata-or-at-least-a-deviation-from-the-open-office-xml-specification" rel="nofollow">Excel's handling of metadata</a>.</p>