title: Couldn't validate XSD SAML metadata file
body: <p>In SAML 2.0 , I took the metadata XSD file from 
  <a href="http://docs.oasis-open.org/security/saml/v2.0/saml-schema-metadata-2.0.xsd" rel="nofollow noreferrer">http://docs.oasis-open.org/security/saml/v2.0/saml-schema-metadata-2.0.xsd</a></p>
  
  <p>And I am trying to validate the XML against its XSD from the above location using the online tool <a href="http://www.utilities-online.info/xsdvalidation/#.VFjicMntid1" rel="nofollow noreferrer">http://www.utilities-online.info/xsdvalidation/#.VFjicMntid1</a>. It is showing error on the XSD file itself. What is the problem with the XSD file?  How can I validate my own SAML metadata XML against its XSD for validation?</p>
  
  <p>Here is the image of the error I am getting.</p>
  
  <p><img src="https://i.stack.imgur.com/RhJYC.png" alt="enter image description here"></p>