diff --git a/src/python/loxi/of10/action.py b/src/python/loxi/of10/action.py
index 6a3abfb..38b674c 100644
--- a/src/python/loxi/of10/action.py
+++ b/src/python/loxi/of10/action.py
@@ -3,27 +3,59 @@
 # Copyright (c) 2012, 2013 Big Switch Networks, Inc.
 # See the file LICENSE.pyloxi which should have been included in the source distribution
 
-# Automatically generated by LOXI from template action.py
+# Automatically generated by LOXI from template module.py
 # Do not modify
 
 import struct
+import loxi
 import const
+import common
+import action
 import util
 import loxi.generic_util
-import loxi
 
-def unpack_list(reader):
-    def deserializer(reader, typ):
-        parser = parsers.get(typ)
-        if not parser: raise loxi.ProtocolError("unknown action type %d" % typ)
-        return parser(reader)
-    return loxi.generic_util.unpack_list_tlv16(reader, deserializer)
+class action(loxi.OFObject):
+    subtypes = {}
 
-class Action(object):
-    type = None # override in subclass
-    pass
+    @staticmethod
+    def unpack(reader):
+        subtype, = reader.peek('!H', 0)
+        try:
+            subclass = action.subtypes[subtype]
+        except KeyError:
+            raise loxi.ProtocolError("unknown action subtype %#x" % subtype)
+        return subclass.unpack(reader)
 
-class bsn_mirror(Action):
+
+class experimenter(action):
+    subtypes = {}
+
+    @staticmethod
+    def unpack(reader):
+        subtype, = reader.peek('!L', 4)
+        try:
+            subclass = experimenter.subtypes[subtype]
+        except KeyError:
+            raise loxi.ProtocolError("unknown experimenter action subtype %#x" % subtype)
+        return subclass.unpack(reader)
+
+action.subtypes[65535] = experimenter
+
+class bsn(experimenter):
+    subtypes = {}
+
+    @staticmethod
+    def unpack(reader):
+        subtype, = reader.peek('!L', 8)
+        try:
+            subclass = bsn.subtypes[subtype]
+        except KeyError:
+            raise loxi.ProtocolError("unknown bsn experimenter action subtype %#x" % subtype)
+        return subclass.unpack(reader)
+
+experimenter.subtypes[6035143] = bsn
+
+class bsn_mirror(bsn):
     type = 65535
     experimenter = 6035143
     subtype = 1
@@ -58,15 +90,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = bsn_mirror()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 65535)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         _experimenter = reader.read("!L")[0]
         assert(_experimenter == 6035143)
         _subtype = reader.read("!L")[0]
@@ -84,13 +114,6 @@
         if self.copy_stage != other.copy_stage: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("bsn_mirror {")
         with q.group():
@@ -107,7 +130,9 @@
             q.breakable()
         q.text('}')
 
-class bsn_set_tunnel_dst(Action):
+bsn.subtypes[1] = bsn_mirror
+
+class bsn_set_tunnel_dst(bsn):
     type = 65535
     experimenter = 6035143
     subtype = 2
@@ -131,15 +156,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = bsn_set_tunnel_dst()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 65535)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         _experimenter = reader.read("!L")[0]
         assert(_experimenter == 6035143)
         _subtype = reader.read("!L")[0]
@@ -152,13 +175,6 @@
         if self.dst != other.dst: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("bsn_set_tunnel_dst {")
         with q.group():
@@ -169,7 +185,9 @@
             q.breakable()
         q.text('}')
 
-class enqueue(Action):
+bsn.subtypes[2] = bsn_set_tunnel_dst
+
+class enqueue(action):
     type = 11
 
     def __init__(self, port=None, queue_id=None):
@@ -195,15 +213,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = enqueue()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 11)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.port = util.unpack_port_no(reader)
         reader.skip(6)
         obj.queue_id = reader.read("!L")[0]
@@ -215,13 +231,6 @@
         if self.queue_id != other.queue_id: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("enqueue {")
         with q.group():
@@ -235,7 +244,23 @@
             q.breakable()
         q.text('}')
 
-class nicira_dec_ttl(Action):
+action.subtypes[11] = enqueue
+
+class nicira(experimenter):
+    subtypes = {}
+
+    @staticmethod
+    def unpack(reader):
+        subtype, = reader.peek('!H', 8)
+        try:
+            subclass = nicira.subtypes[subtype]
+        except KeyError:
+            raise loxi.ProtocolError("unknown nicira experimenter action subtype %#x" % subtype)
+        return subclass.unpack(reader)
+
+experimenter.subtypes[8992] = nicira
+
+class nicira_dec_ttl(nicira):
     type = 65535
     experimenter = 8992
     subtype = 18
@@ -256,15 +281,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = nicira_dec_ttl()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 65535)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         _experimenter = reader.read("!L")[0]
         assert(_experimenter == 8992)
         _subtype = reader.read("!H")[0]
@@ -277,13 +300,6 @@
         if type(self) != type(other): return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("nicira_dec_ttl {")
         with q.group():
@@ -292,7 +308,9 @@
             q.breakable()
         q.text('}')
 
-class output(Action):
+nicira.subtypes[18] = nicira_dec_ttl
+
+class output(action):
     type = 0
 
     def __init__(self, port=None, max_len=None):
@@ -317,15 +335,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = output()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 0)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.port = util.unpack_port_no(reader)
         obj.max_len = reader.read("!H")[0]
         return obj
@@ -336,13 +352,6 @@
         if self.max_len != other.max_len: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("output {")
         with q.group():
@@ -356,7 +365,9 @@
             q.breakable()
         q.text('}')
 
-class set_dl_dst(Action):
+action.subtypes[0] = output
+
+class set_dl_dst(action):
     type = 5
 
     def __init__(self, dl_addr=None):
@@ -377,15 +388,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_dl_dst()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 5)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.dl_addr = list(reader.read('!6B'))
         reader.skip(6)
         return obj
@@ -395,13 +404,6 @@
         if self.dl_addr != other.dl_addr: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_dl_dst {")
         with q.group():
@@ -412,7 +414,9 @@
             q.breakable()
         q.text('}')
 
-class set_dl_src(Action):
+action.subtypes[5] = set_dl_dst
+
+class set_dl_src(action):
     type = 4
 
     def __init__(self, dl_addr=None):
@@ -433,15 +437,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_dl_src()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 4)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.dl_addr = list(reader.read('!6B'))
         reader.skip(6)
         return obj
@@ -451,13 +453,6 @@
         if self.dl_addr != other.dl_addr: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_dl_src {")
         with q.group():
@@ -468,7 +463,9 @@
             q.breakable()
         q.text('}')
 
-class set_nw_dst(Action):
+action.subtypes[4] = set_dl_src
+
+class set_nw_dst(action):
     type = 7
 
     def __init__(self, nw_addr=None):
@@ -488,15 +485,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_nw_dst()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 7)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.nw_addr = reader.read("!L")[0]
         return obj
 
@@ -505,13 +500,6 @@
         if self.nw_addr != other.nw_addr: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_nw_dst {")
         with q.group():
@@ -522,7 +510,9 @@
             q.breakable()
         q.text('}')
 
-class set_nw_src(Action):
+action.subtypes[7] = set_nw_dst
+
+class set_nw_src(action):
     type = 6
 
     def __init__(self, nw_addr=None):
@@ -542,15 +532,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_nw_src()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 6)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.nw_addr = reader.read("!L")[0]
         return obj
 
@@ -559,13 +547,6 @@
         if self.nw_addr != other.nw_addr: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_nw_src {")
         with q.group():
@@ -576,7 +557,9 @@
             q.breakable()
         q.text('}')
 
-class set_nw_tos(Action):
+action.subtypes[6] = set_nw_src
+
+class set_nw_tos(action):
     type = 8
 
     def __init__(self, nw_tos=None):
@@ -597,15 +580,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_nw_tos()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 8)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.nw_tos = reader.read("!B")[0]
         reader.skip(3)
         return obj
@@ -615,13 +596,6 @@
         if self.nw_tos != other.nw_tos: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_nw_tos {")
         with q.group():
@@ -632,7 +606,9 @@
             q.breakable()
         q.text('}')
 
-class set_tp_dst(Action):
+action.subtypes[8] = set_nw_tos
+
+class set_tp_dst(action):
     type = 10
 
     def __init__(self, tp_port=None):
@@ -653,15 +629,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_tp_dst()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 10)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.tp_port = reader.read("!H")[0]
         reader.skip(2)
         return obj
@@ -671,13 +645,6 @@
         if self.tp_port != other.tp_port: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_tp_dst {")
         with q.group():
@@ -688,7 +655,9 @@
             q.breakable()
         q.text('}')
 
-class set_tp_src(Action):
+action.subtypes[10] = set_tp_dst
+
+class set_tp_src(action):
     type = 9
 
     def __init__(self, tp_port=None):
@@ -709,15 +678,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_tp_src()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 9)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.tp_port = reader.read("!H")[0]
         reader.skip(2)
         return obj
@@ -727,13 +694,6 @@
         if self.tp_port != other.tp_port: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_tp_src {")
         with q.group():
@@ -744,7 +704,9 @@
             q.breakable()
         q.text('}')
 
-class set_vlan_pcp(Action):
+action.subtypes[9] = set_tp_src
+
+class set_vlan_pcp(action):
     type = 2
 
     def __init__(self, vlan_pcp=None):
@@ -765,15 +727,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_vlan_pcp()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 2)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.vlan_pcp = reader.read("!B")[0]
         reader.skip(3)
         return obj
@@ -783,13 +743,6 @@
         if self.vlan_pcp != other.vlan_pcp: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_vlan_pcp {")
         with q.group():
@@ -800,7 +753,9 @@
             q.breakable()
         q.text('}')
 
-class set_vlan_vid(Action):
+action.subtypes[2] = set_vlan_pcp
+
+class set_vlan_vid(action):
     type = 1
 
     def __init__(self, vlan_vid=None):
@@ -821,15 +776,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = set_vlan_vid()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 1)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         obj.vlan_vid = reader.read("!H")[0]
         reader.skip(2)
         return obj
@@ -839,13 +792,6 @@
         if self.vlan_vid != other.vlan_vid: return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("set_vlan_vid {")
         with q.group():
@@ -856,7 +802,9 @@
             q.breakable()
         q.text('}')
 
-class strip_vlan(Action):
+action.subtypes[1] = set_vlan_vid
+
+class strip_vlan(action):
     type = 3
 
     def __init__(self):
@@ -872,15 +820,13 @@
         return ''.join(packed)
 
     @staticmethod
-    def unpack(buf):
+    def unpack(reader):
         obj = strip_vlan()
-        if type(buf) == loxi.generic_util.OFReader:
-            reader = buf
-        else:
-            reader = loxi.generic_util.OFReader(buf)
         _type = reader.read("!H")[0]
         assert(_type == 3)
         _len = reader.read("!H")[0]
+        orig_reader = reader
+        reader = orig_reader.slice(_len - (2 + 2))
         reader.skip(4)
         return obj
 
@@ -888,13 +834,6 @@
         if type(self) != type(other): return False
         return True
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def show(self):
-        import loxi.pp
-        return loxi.pp.pp(self)
-
     def pretty_print(self, q):
         q.text("strip_vlan {")
         with q.group():
@@ -903,43 +842,6 @@
             q.breakable()
         q.text('}')
 
+action.subtypes[3] = strip_vlan
 
-def parse_experimenter(reader):
-    experimenter, = reader.peek("!4xL")
-    if experimenter == 0x005c16c7: # Big Switch Networks
-        subtype, = reader.peek("!8xL")
-    elif experimenter == 0x00002320: # Nicira
-        subtype, = reader.peek("!8xH")
-    else:
-        raise loxi.ProtocolError("unexpected experimenter id %#x" % experimenter)
 
-    if subtype in experimenter_parsers[experimenter]:
-        return experimenter_parsers[experimenter][subtype](reader)
-    else:
-        raise loxi.ProtocolError("unexpected BSN experimenter subtype %#x" % subtype)
-
-parsers = {
-    const.OFPAT_OUTPUT : output.unpack,
-    const.OFPAT_SET_VLAN_VID : set_vlan_vid.unpack,
-    const.OFPAT_SET_VLAN_PCP : set_vlan_pcp.unpack,
-    const.OFPAT_STRIP_VLAN : strip_vlan.unpack,
-    const.OFPAT_SET_DL_SRC : set_dl_src.unpack,
-    const.OFPAT_SET_DL_DST : set_dl_dst.unpack,
-    const.OFPAT_SET_NW_SRC : set_nw_src.unpack,
-    const.OFPAT_SET_NW_DST : set_nw_dst.unpack,
-    const.OFPAT_SET_NW_TOS : set_nw_tos.unpack,
-    const.OFPAT_SET_TP_SRC : set_tp_src.unpack,
-    const.OFPAT_SET_TP_DST : set_tp_dst.unpack,
-    const.OFPAT_ENQUEUE : enqueue.unpack,
-    const.OFPAT_EXPERIMENTER : parse_experimenter,
-}
-
-experimenter_parsers = {
-    8992 : {
-        18: nicira_dec_ttl.unpack,
-    },
-    6035143 : {
-        1: bsn_mirror.unpack,
-        2: bsn_set_tunnel_dst.unpack,
-    },
-}