diff --git a/loxi_front_end/identifiers.py b/loxi_front_end/identifiers.py
new file mode 100644
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+++ b/loxi_front_end/identifiers.py
@@ -0,0 +1,99 @@
+# Copyright 2013, Big Switch Networks, Inc.
+#
+# LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
+# the following special exception:
+#
+# LOXI Exception
+#
+# As a special exception to the terms of the EPL, you may distribute libraries
+# generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
+# that copyright and licensing notices generated by LoxiGen are not altered or removed
+# from the LoxiGen Libraries and the notice provided below is (i) included in
+# the LoxiGen Libraries, if distributed in source code form and (ii) included in any
+# documentation for the LoxiGen Libraries, if distributed in binary form.
+#
+# Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
+#
+# You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
+# a copy of the EPL at:
+#
+# http://www.eclipse.org/legal/epl-v10.html
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# EPL for the specific language governing permissions and limitations
+# under the EPL.
+
+##
+# @brief Process identifiers for updating of_g.identifiers
+#
+
+import sys
+import of_h_utils
+from generic_utils import *
+import of_g
+
+##
+# The value to use when an identifier is not defined for a version
+UNDEFINED_IDENT_VALUE = 0
+
+def add_identifiers(all_idents, idents_by_group, version, contents):
+    """
+    Update all_idents with identifiers from an openflow.h header file
+    @param all_idents A dict, usually of_g.identifiers
+    @param idents_by_group A dict for mapping LOXI idents to groups,
+    usually of_g.identifiers_by_group
+    @param version The OF wire version
+    @param contents The contents of an openflow.h file
+    """
+
+    # Get the dictionary of enums from the file text
+    enum_dict = of_h_utils.get_enum_dict(version,
+                                         contents)
+    for name, info in enum_dict.items():
+
+        # info is a DotDict w/ keys ofp_name, ofp_group and value.
+        if name in all_idents:
+            all_idents[name]["values_by_version"][version] = info.value
+            if ((all_idents[name]["ofp_name"] != info.ofp_name or 
+                all_idents[name]["ofp_group"] != info.ofp_group) and
+                info.ofp_name.find("OFPP_") != 0):
+                log("""
+NOTE: Identifier %s has different ofp name or group in version %s
+From ofp name %s, group %s to name %s, group %s.
+This could indicate a name collision in LOXI identifier translation.
+""" % (name, str(version), all_idents[name]["ofp_name"],
+       all_idents[name]["ofp_group"], info.ofp_name, info.ofp_group))
+                # Update stuff assuming newer versions processed later
+                all_idents[name]["ofp_name"] = info.ofp_name
+                all_idents[name]["ofp_group"] = info.ofp_group
+
+        else: # New name
+            all_idents[name] = dict(
+                values_by_version = {version:info.value},
+                common_value = info["value"],
+                ofp_name = info["ofp_name"],
+                ofp_group = info["ofp_group"]
+                )
+            if info["ofp_group"] not in idents_by_group:
+                idents_by_group[info["ofp_group"]] = []
+            if name not in idents_by_group[info["ofp_group"]]:
+                idents_by_group[info["ofp_group"]].append(name)
+
+def all_versions_agree(all_idents, version_list, name):
+    val_list = all_idents[name]["values_by_version"]
+    for version in version_list:
+        if not version in val_list:
+            return False
+        if str(val_list[version]) != str(all_idents[name]["common_value"]):
+            return False
+    return True
+
+def defined_versions_agree(all_idents, version_list, name):
+    val_list = all_idents[name]["values_by_version"]
+    for version in version_list:
+        if version in val_list:
+            if str(val_list[version]) != str(all_idents[name]["common_value"]):
+                return False
+    return True