diff --git a/bridgepoint/ooaofooa.py b/bridgepoint/ooaofooa.py
index a39b4ec..5e3a51c 100644
--- a/bridgepoint/ooaofooa.py
+++ b/bridgepoint/ooaofooa.py
@@ -20,8 +20,10 @@
 import functools
 import os
 import logging
+import zipfile
 import keyword
 import xtuml
+import io
 
 from xtuml import navigate_one as one
 from xtuml import navigate_many as many
@@ -509,12 +511,21 @@ def filename_input(self, path_or_filename):
         
         If the filename is a directory, files that ends with .xtuml located
         somewhere in the directory or sub directories will be loaded as well.
+
+        If the filename is a zip archive, files that ends with .xtuml located
+        somewhere in the archive will be loaded as well.
         '''
         if os.path.isdir(path_or_filename):
             for path, _, files in os.walk(path_or_filename):
                 for name in files:
                     if name.endswith('.xtuml'):
                         xtuml.ModelLoader.filename_input(self, os.path.join(path, name))
+        elif zipfile.is_zipfile(path_or_filename):
+            with zipfile.ZipFile(path_or_filename) as zipinput:
+                for zipinfo in zipinput.filelist:
+                    if zipinfo.filename.endswith('.xtuml'):
+                        with zipinput.open(zipinfo) as f:
+                            xtuml.ModelLoader.file_input(self, io.TextIOWrapper(f, encoding='UTF-8'))
         else:
             xtuml.ModelLoader.filename_input(self, path_or_filename)
 
diff --git a/tests/test_bridgepoint/test_ooaofooa.py b/tests/test_bridgepoint/test_ooaofooa.py
index 5afed37..cc5f84c 100644
--- a/tests/test_bridgepoint/test_ooaofooa.py
+++ b/tests/test_bridgepoint/test_ooaofooa.py
@@ -15,6 +15,9 @@
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with pyxtuml. If not, see <http://www.gnu.org/licenses/>.
+import atexit
+import os
+import shutil
 import unittest
 import xtuml
 from bridgepoint import ooaofooa
@@ -35,7 +38,20 @@ def test_remove_globals(self):
         s = xtuml.serialize_instances(m)
         self.assertFalse(s)
         
-    
+    def test_folder_input(self):
+        dirname = os.path.dirname(__file__) + os.sep + '..' + os.sep + 'resources'
+        metamodel = ooaofooa.load_metamodel(dirname, load_globals=False)
+        self.assertTrue(metamodel.select_any('S_DT', xtuml.where_eq(Name='integer')) is not None)
+
+    def test_zipfile_input(self):
+        dirname = os.path.dirname(__file__) + os.sep + '..' + os.sep + 'resources'
+        zipfile = shutil.make_archive(dirname, 'zip', dirname)
+        atexit.register(os.remove, zipfile)
+
+        metamodel = ooaofooa.load_metamodel(zipfile, load_globals=False)
+        self.assertTrue(metamodel.select_any('S_DT', xtuml.where_eq(Name='integer')) is not None)
+        
+        
 if __name__ == "__main__":
     import logging
     
diff --git a/xtuml/meta.py b/xtuml/meta.py
index d7ecf86..8527ea8 100644
--- a/xtuml/meta.py
+++ b/xtuml/meta.py
@@ -491,7 +491,7 @@ def __init__(self, kind, metamodel=None):
         self.indices = dict()
         self.links = dict()
         self.storage = list()
-        self.clazz = type(kind, (Class,), dict(__metaclass__=self))
+        self.clazz = type(str(kind), (Class,), dict(__metaclass__=self))
         
     def __call__(self, *args, **kwargs):
         '''