diff --git a/core_standard.py b/core_standard.py
new file mode 100644
index 0000000..a420be2
--- /dev/null
+++ b/core_standard.py
@@ -0,0 +1,57 @@
+# -*- coding: utf-8 -*-
+'''
+    librfid - RFID EPC Class 1 Gen2 / ISO/IEC 18000-6C compliant library
+
+    Copyright (C) 2013  Entr'ouvert
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as
+    published by the Free Software Foundation, either version 3 of the
+    License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+    Functions to parse standard response content.
+'''
+
+
+from _exceptions import MalformedDataError
+
+
+def inventory(response):
+    '''
+        Parse response content of 'Inventory' command.
+
+        Return a list of dict describing tags.
+    '''
+    tags = list()
+    if not response.data:
+        return tags
+    nb_tags = int(response.data[0].encode('hex'), 16)
+    end = len(response.data)
+    index = 1
+    for _ in range(0, nb_tags):
+        tag = dict()
+        if index + 5 <= end:
+            tag['EPCLen'] = int(response.data[index].encode('hex'), 16)
+            index += 1
+        else :
+            raise MalformedDataError('Data content is malformed.')
+        if index  + 3 + tag['EPCLen'] <= end:
+            tag['EPC'] = response.data[index:index+tag['EPCLen']]
+            index += tag['EPCLen']
+            tag['AntID'] = int(response.data[index].encode('hex'), 16)
+            index += 1
+            tag['NbRead'] = int(response.data[index:index+2].encode('hex'), 16)
+            index += 2
+        else:
+            raise MalformedDataError('Data content is malformed.')
+        tags.append(tag)
+    return tags