diff --git a/doc/source/event_concept.rst b/doc/source/event_concept.rst
index ff5114a..3e77ce5 100644
--- a/doc/source/event_concept.rst
+++ b/doc/source/event_concept.rst
@@ -104,7 +104,7 @@ details):
                     "name": "public"
                 }
             ],
-            "id": "openstack:06747855d62547d4bfd707f75b8a1c54",
+            "id": "06747855d62547d4bfd707f75b8a1c54",
             "name": "nova"
         },
         "observer": {
@@ -112,7 +112,7 @@ details):
         },
         # tags use to query events on,
         "tags": [
-            "correlation_id?value=openstack:56cdde6f-6b4e-48a4-94e6-defb40522fb2"
+            "correlation_id?value=56cdde6f-6b4e-48a4-94e6-defb40522fb2"
         ],
         "eventType": "activity",
         "initiator": {
@@ -128,8 +128,8 @@ details):
                 "agent": "python-novaclient",
                 "address": "9.26.26.250"
             },
-            "project_id": "openstack:e7e2bcc9c0df4f3eabcd412ae62503f6",
-            "id": "openstack:68a3f50705a54f799ce94380fc02ed8a"
+            "project_id": "e7e2bcc9c0df4f3eabcd412ae62503f6",
+            "id": "68a3f50705a54f799ce94380fc02ed8a"
         },
         # optional Reason for activity event,
         "reason": {
@@ -148,7 +148,7 @@ details):
         ],
         "action": "authenticate/logon",
         "outcome": "success",
-        "id": "openstack:0a196053-95de-48f8-9890-4527b25b5007",
+        "id": "0a196053-95de-48f8-9890-4527b25b5007",
         # Event model is extensible so additional attributes may be added to describe model,
         "requestPath": "/v2/e7e2bcc9c0df4f3eabcd412ae62503f6/os-certificates"
     }
@@ -188,7 +188,7 @@ Event serialisation:
         "eventTime": "2014-02-27T19:29:30.855665+0000",
         "target": {
             "typeURI": "service/compute/cpu",
-            "id": "openstack:06747855d62547d4bfd707f75b8a1c54",
+            "id": "06747855d62547d4bfd707f75b8a1c54",
             "name": "instance"
         },
         "observer": {
@@ -198,13 +198,13 @@ Event serialisation:
         "initiator": {
             "typeURI": "service/oss/monitoring",
             "name": "ceilometer-pollster",
-            "id": "openstack:68a3f50705a54f799ce94380fc02ed8a"
+            "id": "68a3f50705a54f799ce94380fc02ed8a"
         },
         "measurement": [
             {
                 "result": "80",
                 "metric": {
-                    "metricId": "openstack:<metric_id>",
+                    "metricId": "<metric_id>",
                     "unit": "%",
                     "name": "CPU utilisation metric"
                 }
@@ -212,7 +212,7 @@ Event serialisation:
         ],
         "action": "monitor",
         "outcome": "success",
-        "id": "openstack:0a196053-95de-48f8-9890-4527b25b5007"
+        "id": "0a196053-95de-48f8-9890-4527b25b5007"
     }
 
 .. note::
diff --git a/doc/source/specification/events.rst b/doc/source/specification/events.rst
index 7cd781c..058c6de 100644
--- a/doc/source/specification/events.rst
+++ b/doc/source/specification/events.rst
@@ -54,7 +54,7 @@ Serialisation
 
        {
         "typeURI": "http://schemas.dmtf.org/cloud/audit/1.0/event",
-        "id": "openstack:a80dc5ee-be83-48ad-ad5e-6577f2217637",
+        "id": "a80dc5ee-be83-48ad-ad5e-6577f2217637",
         "eventType": "activity",
         "action": "read",
         "outcome": "success",
@@ -64,10 +64,10 @@ Serialisation
         },
         "eventTime": "2014-01-17T23:23:38.109989+0000",
         "initiator": {
-            "id": "openstack:95f12d248a234a969f456cd2c794f29a",
+            "id": "95f12d248a234a969f456cd2c794f29a",
             "typeURI": "service/security/account/user",
             "name": "admin",
-            "project_id": "openstack:e55b158759854ea6a7852aa76632c6c1",
+            "project_id": "e55b158759854ea6a7852aa76632c6c1",
             "credential": {
                 "token": "MIIQBgYJKoZIhvcNAQcCoIIP9z xxxxxx KoZIhvcIP9z=",
                 "identity_status": "Confirmed"
@@ -78,7 +78,7 @@ Serialisation
             }
         },
         "target": {
-            "id": "openstack:0f126160203748a5b4923f2eb6e3b7db",
+            "id": "0f126160203748a5b4923f2eb6e3b7db",
             "typeURI": "service/compute/servers",
             "name": "nova",
             "addresses": [
@@ -110,6 +110,6 @@ Serialisation
         ],
         "requestPath": "/v2/56600971-90f3-4370-807f-ab79339381a9/servers",
         "tags": [
-            "correlation_id?value=openstack:bcac04dc-e0be-4110-862c-347088a7836a"
+            "correlation_id?value=bcac04dc-e0be-4110-862c-347088a7836a"
         ]
     }
diff --git a/pycadf/identifier.py b/pycadf/identifier.py
index de9e8eb..cb60627 100644
--- a/pycadf/identifier.py
+++ b/pycadf/identifier.py
@@ -11,11 +11,11 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under
 # the License.
-
+import hashlib
 import uuid
 
+from debtcollector import removals
 from oslo_config import cfg
-import six
 
 CONF = cfg.CONF
 opts = [
@@ -26,29 +26,35 @@ opts = [
 CONF.register_opts(opts, group='audit')
 
 
-# TODO(mrutkows): make the namespace prefix configurable and have it resolve to
-# a full openstack namespace/domain value via some declaration (e.g.
-# "openstack:" == "http:\\www.openstack.org\")...
+AUDIT_NS = None
+if CONF.audit.namespace:
+    md5_hash = hashlib.md5(CONF.audit.namespace.encode('utf-8'))
+    AUDIT_NS = uuid.UUID(md5_hash.hexdigest())
+
+
 def generate_uuid():
     """Generate a CADF identifier
     """
-    return norm_ns(str(uuid.uuid4()))
+    if AUDIT_NS:
+        return str(uuid.uuid5(AUDIT_NS, str(uuid.uuid4())))
+    return str(uuid.uuid4())
 
 
+@removals.remove
 def norm_ns(str_id):
-    """Apply a namespace to the identifier
-    """
+    """Apply a namespace to the identifier """
     prefix = CONF.audit.namespace + ':' if CONF.audit.namespace else ''
     return prefix + str_id
 
 
-# TODO(mrutkows): validate any cadf:Identifier (type) record against
-# CADF schema.  This would include schema validation as an optional parm.
 def is_valid(value):
     """Validation to ensure Identifier is correct.
     """
-    if not isinstance(value, six.string_types):
-        raise TypeError
-    elif not value:
+    if value in ['target', 'initiator', 'observer']:
+        return True
+    try:
+        uuid.UUID(value)
+    except ValueError:
         return False
-    return True
+    else:
+        return True
diff --git a/requirements.txt b/requirements.txt
index 412d57e..40dfd57 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ oslo.config>=2.7.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 pytz>=2013.6
 six>=1.9.0
+debtcollector>=0.3.0 # Apache-2.0