diff --git a/rdflib/__init__.py b/rdflib/__init__.py
index 386d14eb8..9b8daeb0e 100644
--- a/rdflib/__init__.py
+++ b/rdflib/__init__.py
@@ -167,6 +167,7 @@
     CSVW,
     DC,
     DCAT,
+    DCMITYPE,
     DCTERMS,
     DOAP,
     FOAF,
diff --git a/rdflib/namespace/__init__.py b/rdflib/namespace/__init__.py
index 86dbdba4d..0487a55da 100644
--- a/rdflib/namespace/__init__.py
+++ b/rdflib/namespace/__init__.py
@@ -701,6 +701,7 @@ def get_longest_namespace(trie, value):
 from rdflib.namespace._CSVW import CSVW
 from rdflib.namespace._DC import DC
 from rdflib.namespace._DCAT import DCAT
+from rdflib.namespace._DCMITYPE import DCMITYPE
 from rdflib.namespace._DCTERMS import DCTERMS
 from rdflib.namespace._DOAP import DOAP
 from rdflib.namespace._FOAF import FOAF
diff --git a/rdflib/store.py b/rdflib/store.py
index 915ca57ad..a7aa8d0b0 100644
--- a/rdflib/store.py
+++ b/rdflib/store.py
@@ -364,6 +364,11 @@ def namespace(self, prefix):
 
     def namespaces(self):
         """ """
+        # This is here so that the function becomes an empty generator.
+        # See https://stackoverflow.com/q/13243766 and
+        # https://www.python.org/dev/peps/pep-0255/#why-a-new-keyword-for-yield-why-not-a-builtin-function-instead
+        if False:
+            yield None  # type: ignore[unreachable]
 
     # Optional Transactional methods
 
diff --git a/test/test_store.py b/test/test_store.py
new file mode 100644
index 000000000..d4d8d0a8a
--- /dev/null
+++ b/test/test_store.py
@@ -0,0 +1,25 @@
+import unittest
+from rdflib import Graph
+from rdflib.store import Store
+from rdflib.namespace import NamespaceManager
+
+
+class TestAbstractStore(unittest.TestCase):
+    def test_namespaces(self):
+        """
+        This tests that Store.namespaces is an empty generator.
+        """
+        store = Store()
+        self.assertEqual(list(store.namespaces()), [])
+
+    def test_namespaces_via_manager(self):
+        """
+        This tests that NamespaceManager.namespaces works correctly with an
+        abstract Store.
+        """
+        namespace_manager = NamespaceManager(Graph(store=Store()))
+        self.assertEqual(list(namespace_manager.namespaces()), [])
+
+
+if __name__ == "__main__":
+    unittest.main()