diff --git a/src/rdf_utils/namespace.py b/src/rdf_utils/namespace.py
index 55648b5..1cdca3b 100644
--- a/src/rdf_utils/namespace.py
+++ b/src/rdf_utils/namespace.py
@@ -7,6 +7,7 @@
     URI_MM_GEOM_COORD,
     URI_MM_PYTHON,
     URI_MM_ENV,
+    URI_MM_TIME,
 )
 
 
@@ -18,3 +19,4 @@
 
 NS_MM_ENV = Namespace(URI_MM_ENV)
 NS_MM_AGN = Namespace(URI_MM_AGN)
+NS_MM_TIME = Namespace(URI_MM_TIME)
diff --git a/src/rdf_utils/uri.py b/src/rdf_utils/uri.py
index c65d33d..7f37e73 100644
--- a/src/rdf_utils/uri.py
+++ b/src/rdf_utils/uri.py
@@ -14,3 +14,4 @@
 URI_MM_PYTHON = f"{URL_SECORO_MM}/languages/python#"
 URI_MM_ENV = f"{URL_SECORO_MM}/environment#"
 URI_MM_AGN = f"{URL_SECORO_MM}/agent#"
+URI_MM_TIME = f"{URL_SECORO_MM}/time#"