code: def eprints_description(metadataPolicy, dataPolicy,
                          submissionPolicy=None, content=None):
      
      eprints = Element(etree.QName(NS_EPRINTS[None], 'eprints'),
                        nsmap=NS_EPRINTS)
      eprints.set(etree.QName(ns['xsi'], 'schemaLocation'),
                  '{0} {1}'.format(EPRINTS_SCHEMA_LOCATION,
                                   EPRINTS_SCHEMA_LOCATION_XSD))
      if content:
          contentElement = etree.Element('content')
          for key, value in content.items():
              contentElement.append(E(key, value))
          eprints.append(contentElement)
  
      metadataPolicyElement = etree.Element('metadataPolicy')
      for key, value in metadataPolicy.items():
          metadataPolicyElement.append(E(key, value))
          eprints.append(metadataPolicyElement)
  
      dataPolicyElement = etree.Element('dataPolicy')
      for key, value in dataPolicy.items():
          dataPolicyElement.append(E(key, value))
          eprints.append(dataPolicyElement)
  
      if submissionPolicy:
          submissionPolicyElement = etree.Element('submissionPolicy')
          for key, value in submissionPolicy.items():
              submissionPolicyElement.append(E(key, value))
          eprints.append(submissionPolicyElement)
      return etree.tostring(eprints, pretty_print=True)
docs: Generate the eprints element for the identify response.
  
      The eprints container is used by the e-print community to describe
      the content and policies of repositories.
      For the full specification and schema definition visit:
      http://www.openarchives.org/OAI/2.0/guidelines-eprints.htm