diff --git a/ocrd_models/ocrd_models/ocrd_page_generateds.py b/ocrd_models/ocrd_models/ocrd_page_generateds.py
index 46af7ebd2..38373410a 100644
--- a/ocrd_models/ocrd_models/ocrd_page_generateds.py
+++ b/ocrd_models/ocrd_models/ocrd_page_generateds.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 #
-# Generated Fri May 29 23:29:23 2020 by generateDS.py version 2.35.20.
+# Generated Sat Jun  6 14:44:44 2020 by generateDS.py version 2.35.20.
 # Python 3.6.9 (default, Apr 18 2020, 01:56:04)  [GCC 8.4.0]
 #
 # Command line options:
@@ -16,7 +16,7 @@
 #   repo/assets/data/schema/data/2019.xsd
 #
 # Command line:
-#   /home/kba/ocrd_all/venv/bin/generateDS -f --root-element="PcGts" -o "ocrd_models/ocrd_models/ocrd_page_generateds.py" --disable-generatedssuper-lookup --user-methods="ocrd_models/ocrd_page_user_methods.py" repo/assets/data/schema/data/2019.xsd
+#   /home/kba/env/py3-disht/bin/generateDS -f --root-element="PcGts" -o "ocrd_models/ocrd_models/ocrd_page_generateds.py" --disable-generatedssuper-lookup --user-methods="ocrd_models/ocrd_page_user_methods.py" repo/assets/data/schema/data/2019.xsd
 #
 # Current working directory (os.getcwd()):
 #   core
@@ -5461,6 +5461,9 @@ def clear_AllIndexed(self):
     def extend_AllIndexed(self, elements, validate_continuity=False):
         """
         Add all elements in list ``elements``, respecting ``@index`` order.
+        With ``validate_continuity``, check that all new elements come after all old elements
+        (or raise an exception). 
+        Otherwise, ensure this condition silently (by increasing ``@index`` accordingly).
         """
         if not isinstance(elements, list):
             elements = [elements]
@@ -5483,7 +5486,6 @@ def extend_AllIndexed(self, elements, validate_continuity=False):
             elif isinstance(element, UnorderedGroupIndexedType): # pylint: disable=undefined-variable
                 self.add_UnorderedGroupIndexed(element)
         return self.get_AllIndexed()
-    
     # pylint: disable=line-too-long,invalid-name,missing-module-docstring
     def sort_AllIndexed(self, validate_uniqueness=True):
         """
@@ -6307,6 +6309,9 @@ def clear_AllIndexed(self):
     def extend_AllIndexed(self, elements, validate_continuity=False):
         """
         Add all elements in list ``elements``, respecting ``@index`` order.
+        With ``validate_continuity``, check that all new elements come after all old elements
+        (or raise an exception). 
+        Otherwise, ensure this condition silently (by increasing ``@index`` accordingly).
         """
         if not isinstance(elements, list):
             elements = [elements]
@@ -6329,7 +6334,6 @@ def extend_AllIndexed(self, elements, validate_continuity=False):
             elif isinstance(element, UnorderedGroupIndexedType): # pylint: disable=undefined-variable
                 self.add_UnorderedGroupIndexed(element)
         return self.get_AllIndexed()
-    
     # pylint: disable=line-too-long,invalid-name,missing-module-docstring
     def sort_AllIndexed(self, validate_uniqueness=True):
         """
diff --git a/ocrd_models/ocrd_page_user_methods.py b/ocrd_models/ocrd_page_user_methods.py
index 27714c408..ff39000eb 100644
--- a/ocrd_models/ocrd_page_user_methods.py
+++ b/ocrd_models/ocrd_page_user_methods.py
@@ -82,12 +82,14 @@ def show(self):
 #   generated superclass file and also section "User Methods" in
 #   the documentation, as well as the examples below.
 
-def _add_method(class_re, method_name):
+def _add_method(class_re, method_name, file_name=None):
     """
     Loads a file ./ocrd_page_user_methods/{{ method_name }}.py and defines a MethodSpec applying to class_re
     """
     source = []
-    with codecs.open(join(dirname(__file__), 'ocrd_page_user_methods', '%s.py' % method_name)) as f:
+    if not file_name:
+        file_name = method_name
+    with codecs.open(join(dirname(__file__), 'ocrd_page_user_methods', '%s.py' % file_name)) as f:
         for line in f.readlines():
             source.append('    %s' % line if line else line)
     return MethodSpec(name=method_name, class_names=class_re, source=''.join(source))
@@ -102,7 +104,7 @@ def _add_method(class_re, method_name):
     _add_method(r'^(OrderedGroupType|OrderedGroupIndexedType)$', 'clear_AllIndexed'),
     _add_method(r'^(OrderedGroupType|OrderedGroupIndexedType)$', 'extend_AllIndexed'),
     _add_method(r'^(OrderedGroupType|OrderedGroupIndexedType)$', 'sort_AllIndexed'),
-    _add_method(r'^(OrderedGroupType|OrderedGroupIndexedType)$', 'exportChildren'),
+    _add_method(r'^(OrderedGroupType|OrderedGroupIndexedType)$', 'exportChildren', 'exportChildren_GroupType'),
     _add_method(r'^(UnorderedGroupType|UnorderedGroupIndexedType)$', 'get_UnorderedGroupChildren'),
     _add_method(r'^(PageType)$', 'get_AllRegions'),
     )
diff --git a/ocrd_models/ocrd_page_user_methods/exportChildren.py b/ocrd_models/ocrd_page_user_methods/exportChildren_GroupType.py
similarity index 100%
rename from ocrd_models/ocrd_page_user_methods/exportChildren.py
rename to ocrd_models/ocrd_page_user_methods/exportChildren_GroupType.py