title: XLSX file Into a Zip
body: <p>I've been given an excel file that already has a xml schema mapped to it. I need to add a new element to the schema and map a column from an excel table to it, however I dont have the original .xsd file. I searched stack overflow and found that people had success by renaming their excel files into .zip and then they were able to open the new zip file and edit the xml schema as necessary.</p>
  
  <p>I've tried renaming my excel file to .zip but it doesnt change the file type for xlsx to zip, and I cant open it using windows default zip function. I've also tried downloading winzip and then performing the same action.</p>
  
  <p>I'm using windows 7, and office 2013 on a 32bit system. Is there something I am missing? Is there any other freeware tools that can let me see the xml schema mapped in the excel file?</p>
  
  <p>Any help on this would be great!</p>