Error for Keystone V3 extension "OS-SIMPLE-CERT" for XML interface

I tried to execute keystone V3 API "OS-SIMPLE-CERT/certificates" for xml interface using curl request.

The response of the curl request doesnt contain a status code and an error message is observed.

-Below is the curl command used:

 curl -i -X GET http://127.0.0.1:35357/v3/OS-SIMPLE-CERT/certificates
 -H "Content-Type: application/xml" -H "Accept: application/xml" -H "User-Agent: python-keystoneclient"
 -H "X-Auth-Token: <Token-Omitted>"

-Below is the response:

  Output:
  HTTP/1.1 None None
  Vary: X-Auth-Token
  Content-Type: application/json
  Content-Length: 4384
  Date: Thu, 17 Apr 2014 07:06:07 GMT

  {"error": {"message": "Certificate:\n Data:\n Version:
           3 (0x2)\n Serial Number: 1 (0x1)\n
           Signature Algorithm: sha1WithRSAEncryption\n
           Issuer: C=US, ST=Unset, L=Unset, O=Unset, CN=www.example.com\n
           Validity\n Not Before: Apr 17 06:58:08 2014 GMT\n
           Not After : Apr 14 06:58:08 2024 GMT\n Subject: C=US,
           ST=Unset, O=Unset, CN=www.example.com\n Subject Public Key Info:\n
           Public Key Algorithm: rsaEncryption\n Public-Key: (2048 bit)\n
           Modulus:\n 00:db:f2:8d:33:10:a3:b7:5a:c9:6e:58:a1:c9:2b:\n
           89:f2:d2:2d:88:a7:73:a4:da:48:3e:2b:57:2e:99:\n
           51:a8:73:26:5c:a0:54:32:1f:ad:35:8a:5a:65:2b:\n
           22:13:18:9f:66:ac:09:0b:31:60:21:80:2f:af:5e:\n
           03:7e:e0:66:8d:9d:b8:2e:87:82:ca:74:ee:b5:92:\n
           4c:d8:f5:c9:33:c1:de:fe:29:c7:2e:ac:7d:10:8e:\n
           57:27:27:36:b2:70:d5:d5:e0:be:7f:b6:68:af:e5:\n
           a8:17:94:25:3e:80:69:c8:ad:72:c9:ce:b5:3a:d9:\n
           71:f3:fd:45:50:2e:8f:c2:43:65:34:98:03:ee:14:\n
           60:82:30:f7:14:85:2d:cb:5c:d4:92:55:e6:81:1e:\n
           9f:93:df:3e:dc:3b:ad:0d:54:84:e1:48:20:73:42:\n
           63:c0:54:4e:7b:e3:f3:70:97:f2:d6:ac:2e:33:c8:\n
           4f:d1:9d:ef:a5:36:c5:d0:0b:19:d2:5f:3f:08:88:\n
           f5:bf:44:57:88:c2:23:87:b6:42:7e:0d:3d:6b:b2:\n
           a9:a1:56:5d:8a:20:c2:5d:b2:7f:01:ee:1f:5a:ee:\n
           b7:ff:38:02:e6:bf:a8:ad:cc:3a:bd:18:6c:1b:b9:\n
           c1:eb:d4:50:58:4a:49:fd:52:64:4b:a9:92:80:7b:\n
           9d:95\n Exponent: 65537 (0x10001)\n
           X509v3 extensions:\n X509v3 Basic Constraints: \n
           CA:FALSE\n X509v3 Subject Key Identifier: \n
           75:B4:09:04:09:5A:50:70:F6:15:E7:1F:D0:ED:26:7E:2A:7D:AF:7B\n
           X509v3 Authority Key Identifier: \n
           keyid:62:CC:B7:5A:72:BB:A0:7D:47:03:62:6B:6E:05:B0:FB:E6:1A:88:EE\n\n
           Signature Algorithm: sha1WithRSAEncryption\n
           4a:20:15:6d:70:09:6f:a6:7d:e7:8c:6a:26:77:e3:57:33:34:\n
           b9:53:06:da:4e:76:3e:83:7c:79:c1:cf:aa:36:d9:05:c5:2f:\n
           1f:81:44:ec:19:40:25:91:1f:cb:99:51:93:93:f1:6c:61:32:\n
           0d:9e:a9:ce:e9:a7:30:43:a8:a8:7b:96:35:ea:e3:59:f9:df:\n
           f1:f8:48:e0:7b:36:eb:c4:ae:c7:1d:13:aa:be:9a:79:c5:ba:\n
           89:5d:bb:3c:4f:ea:73:c4:1f:96:e1:c8:19:f4:1e:06:50:cb:\n
           75:dd:ed:95:d6:02:1d:08:2b:73:82:24:68:7a:c6:91:f8:06:\n
           58:f5:f9:ff:6c:7b:40:8a:0c:f9:11:e9:a2:d7:46:bb:f8:74:\n
           78:29:46:aa:c2:86:10:7c:48:7f:90:57:82:85:a2:f5:53:25:\n
           97:c5:4a:83:10:db:22:d8:9a:c4:7c:a3:bc:3d:9d:f0:d0:9f:\n
           fd:d5:4c:e4:74:3b:74:9c:73:f1:74:0b:b9:1a:31:a5:17:b1:\n
           4b:fa:94:ee:f0:f4:34:0f:40:56:b7:6a:69:96:b7:8a:83:5e:\n
           11:00:22:06:c1:3b:82:25:cd:1b:4b:88:0d:34:f8:af:2d:7b:\n
           27:4d:74:ea:ee:6a:25:dc:1d:64:a1:5d:75:1f:4c:8f:f5:76:\n
          6d:af:cd:06\n
          -----BEGIN CERTIFICATE-----\n
          MIIDZjCCAk6gAwIBAgIBATANBgkqhkiG9w0BAQUFADBXMQswCQYDVQQGEwJVUzEO\n
          MAwGA1UECAwFVW5zZXQxDjAMBgNVBAcMBVVuc2V0MQ4wDAYDVQQKDAVVbnNldDEY\n
          MBYGA1UEAwwPd3d3LmV4YW1wbGUuY29tMB4XDTE0MDQxNzA2NTgwOFoXDTI0MDQx\n
          NDA2NTgwOFowRzELMAkGA1UEBhMCVVMxDjAMBgNVBAgMBVVuc2V0MQ4wDAYDVQQK\n
          DAVVbnNldDEYMBYGA1UEAwwPd3d3LmV4YW1wbGUuY29tMIIBIjANBgkqhkiG9w0B\n
          AQEFAAOCAQ8AMIIBCgKCAQEA2/KNMxCjt1rJblihySuJ8tItiKdzpNpIPitXLplR\n
          qHMmXKBUMh+tNYpaZSsiExifZqwJCzFgIYAvr14DfuBmjZ24LoeCynTutZJM2PXJ\n
          M8He/inHLqx9EI5XJyc2snDV1eC+f7Zor+WoF5QlPoBpyK1yyc61Otlx8/1FUC6P\n
          wkNlNJgD7hRggjD3FIUty1zUklXmgR6fk98+3DutDVSE4Uggc0JjwFROe+PzcJfy\n
          1qwuM8hP0Z3vpTbF0AsZ0l8/CIj1v0RXiMIjh7ZCfg09a7KpoVZdiiDCXbJ/Ae4f\n
          Wu63/zgC5r+orcw6vRhsG7nB69RQWEpJ/VJkS6mSgHudlQIDAQABo00wSzAJBgNV\n
          HRMEAjAAMB0GA1UdDgQWBBR1tAkECVpQcPYV5x/Q7SZ+Kn2vezAfBgNVHSMEGDAW\n
          gBRizLdacrugfUcDYmtuBbD75hqI7jANBgkqhkiG9w0BAQUFAAOCAQEASiAVbXAJ\n
          b6Z954xqJnfjVzM0uVMG2k52PoN8ecHPqjbZBcUvH4FE7BlAJZEfy5lRk5PxbGEy\n
          DZ6pzumnMEOoqHuWNerjWfnf8fhI4Hs268Suxx0Tqr6aecW6iV27PE/qc8QfluHI\n
          GfQeBlDLdd3tldYCHQgrc4IkaHrGkfgGWPX5/2x7QIoM+RHpotdGu/h0eClGqsKG\n
          EHxIf5BXgoWi9VMll8VKgxDbItiaxHyjvD2d8NCf/dVM5HQ7dJxz8XQLuRoxpRex\n
          S/qU7vD0NA9AVrdqaZa3ioNeEQAiBsE7giXNG0uIDTT4ry17J0106u5qJdwdZKFd\n
          dR9Mj/V2ba/NBg==\n
          -----END CERTIFICATE-----\n",
          "code": null, "title": null}}

The same curl request worked fine for json interface.

Can anyone clarify whether xml interface is there are not , ASAP.

-Regards,
 Meenakshi