diff --git a/tools/python/jwutils/ArgsContainer.py b/tools/python/jwutils/ArgsContainer.py
index 5019701..3adcdb2 100644
--- a/tools/python/jwutils/ArgsContainer.py
+++ b/tools/python/jwutils/ArgsContainer.py
@@ -11,6 +11,7 @@ class ArgsContainer: # export
     __args = OrderedDict()
     __kwargs = OrderedDict()
     __values = {}
+    __specified_args = list()
 
     def __getattr__(self, name):
         values = self.__values
@@ -27,6 +28,7 @@ class ArgsContainer: # export
         if not name in self.__kwargs.keys():
             raise Exception(f'No argument "{name}" defined')
         self.__values[name] = value
+        self.__specified_args.append(name)
 
     def add_argument(self, *args, **kwargs):
         for arg in args:
@@ -63,6 +65,10 @@ class ArgsContainer: # export
                 pass
             slog(prio, f'{name}: {val}', caller=caller)
 
+    @property
+    def specified_args(self):
+        return self.__specified_args
+
 def add_argument(p: argparse.ArgumentParser|ArgsContainer, name: str, *args, **kwargs): # export
 
     key = name.strip('--').replace('-', '_')