title: SAML Subject name format
body: <p>In the page attribute contract we are having a field called subject name format, but here there are so many formats as follow,</p>
  
  <pre><code>•   urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified
  •   urn:oasis:names:tc:SAML:1.1:nameid-format:emailaddress
  •   urn:oasis:names:tc:SAML:1.1:nameid-format:X509subjectname
  •   urn:oasis:names:tc:SAML:1.1:nameid-format:Windows Domain Qualified name
  •   urn:oasis:names:tc:SAML:2.0:nameid-format:kerberos
  •   urn:oasis:names:tc:SAML:1.1:nameid-format:entity
  </code></pre>
  
  <p>could you guys please explain me why and where these name formats are being used.</p>