title: Where to find Office 2007/2010/2013 Open XML Schemas
body: <p>I am looking to pull together all of the XML schemas that Office 2007/2010/2013 documents abide by. I have found a number from the ISO/IEC 29500:2012 spec and ECMA-376 spec. I have also located a few on w3.org (e.g. xmldsig#). But I have been unable to find the majority of them (e.g. the schemas for <code>http://schemas.openxmlformats.org/spreadsheetml/2006/main</code>).</p>
  
  <p>Searching on microsoft.com only yields pages like <a href="http://msdn.microsoft.com/en-us/library/dd979954%28v=office.12%29.aspx">this</a> that seem to have this content. However, most of these schemas do <code>&lt;xs:imports&gt;</code>s  to files that I can't find.</p>
  
  <p>Has anyone else had any luck finding these files?</p>