diff --git a/qurator/modstool/altotool.py b/qurator/modstool/altotool.py
index 3115f67..1cecc03 100755
--- a/qurator/modstool/altotool.py
+++ b/qurator/modstool/altotool.py
@@ -39,11 +39,14 @@ def alto_to_dict(alto, raise_errors=True):
             value[localname] = TagGroup(tag, group).is_singleton().has_no_attributes().text()
         elif localname == 'OCRProcessing':
             value[localname] = TagGroup(tag, group).is_singleton().descend(raise_errors)
+        elif localname == 'Processing':
+            # TODO This enumerated descent is used more than once, DRY!
+            for n, e in enumerate(group):
+                value[f'{localname}{n}'] = alto_to_dict(e, raise_errors)
         elif localname == 'ocrProcessingStep':
             for n, e in enumerate(group):
                 value[f'{localname}{n}'] = alto_to_dict(e, raise_errors)
         elif localname == 'preProcessingStep':
-            # TODO This enumerated descent is used more than once, DRY!
             for n, e in enumerate(group):
                 value[f'{localname}{n}'] = alto_to_dict(e, raise_errors)
         elif localname == 'processingDateTime':
@@ -76,6 +79,8 @@ def alto_to_dict(alto, raise_errors=True):
             value['Page'].update(TagGroup(tag, group).subelement_counts())
         elif localname == 'Styles':
             pass
+        elif localname == 'Tags':
+            pass
         else:
             if raise_errors:
                 print(value)
diff --git a/qurator/modstool/lib.py b/qurator/modstool/lib.py
index 1e8b560..75d0f86 100644
--- a/qurator/modstool/lib.py
+++ b/qurator/modstool/lib.py
@@ -231,6 +231,7 @@ def _to_dict(root, raise_errors):
         "http://schema.ccs-gmbh.com/ALTO",
         "http://www.loc.gov/standards/alto/",
         "http://www.loc.gov/standards/alto/ns-v2#",
+        "http://www.loc.gov/standards/alto/ns-v4#",
     ]:
         return alto_to_dict(root, raise_errors)
     else: