does not allow services and rougail namespace

src/rougail/objspace.py

@@ -141,6 +141,11 @@ class RougailObjSpace:
                            ):
         """Parses a Rougail XML file and populates the RougailObjSpace
         """
+        if namespace in ['services', Config['variable_namespace']]:
+            msg = _(f'Namespace name "{namespace}" is not allowed in "{xmlfile}"')
+            raise DictConsistencyError(msg, 21)
+        if not namespace:
+            namespace = Config['variable_namespace']
         redefine_variables = []
         self._xml_parse(xmlfile,
                         document,

src/rougail/rougail.py

@@ -6,7 +6,8 @@ Sample usage::
 
     >>> from rougail import Rougail
     >>> rougail = Rougail('/usr/share/rougail/rougail.dtd')
-    >>> rougail.create_or_populate_from_xml('rougail', ['/usr/share/rougail/dicos'])
+    >>> rougail.create_or_populate_from_xml(['/usr/share/rougail/dicos'])
+    >>> rougail.create_or_populate_from_xml(['/usr/share/rougail/extra1'], 'extra1')
     >>> rougail.space_visitor('/usr/share/rougail/funcs.py')
     >>> tiramisu = rougail.save()
 
@@ -39,8 +40,8 @@ class Rougail:
         self.funcs_path = None
 
     def create_or_populate_from_xml(self,
-                                    namespace: str,
                                     xmlfolders: List[str],
+                                    namespace: str=None,
                                     ) -> List[str]:
         """Parses a bunch of XML files and populates the RougailObjSpace
         """