diff --git a/Changelog.md b/Changelog.md
index 4c6d463..4232295 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,9 @@
+# 2.5.2
+
+## Common
+
+- Add reserved variable `netlist_source`
+
 # 2.5.1
 
 ## CLI
diff --git a/cace/__version__.py b/cace/__version__.py
index 1f50cca..f79ba7f 100644
--- a/cace/__version__.py
+++ b/cace/__version__.py
@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-__version__ = '2.5.1'
+__version__ = '2.5.2'
 
 if __name__ == '__main__':
     print(__version__, end='')
diff --git a/cace/parameter/parameter_ngspice.py b/cace/parameter/parameter_ngspice.py
index 2013f38..6b46ff1 100755
--- a/cace/parameter/parameter_ngspice.py
+++ b/cace/parameter/parameter_ngspice.py
@@ -326,6 +326,7 @@ def implementation(self):
                         'templates': os.path.abspath(self.paths['templates']),
                         'simpath': os.path.abspath(outpath),
                         'DUT_name': self.datasheet['name'],
+                        'netlist_source': source,
                         'N': index,
                         'DUT_path': os.path.abspath(dutpath),
                         'PDK_ROOT': get_pdk_root(),
diff --git a/docs/source/reference_manual/template_format.md b/docs/source/reference_manual/template_format.md
index ecf585b..f20829d 100644
--- a/docs/source/reference_manual/template_format.md
+++ b/docs/source/reference_manual/template_format.md
@@ -24,10 +24,6 @@ that is substituted by CACE. The syntax follows three essential rules:
 	
 	> The name of the path to simulation files.
 
-- `CACE{random}`
-	
-	> A random integer number.
-
 - `CACE{DUT_path}`
 	
 	> The full path to the DUT subcircuit definition netlist.
@@ -36,6 +32,10 @@ that is substituted by CACE. The syntax follows three essential rules:
 	
 	> The name of the DUT subcircuit
 
+- `CACE{netlist_source}`
+	
+	> The current netlist source such as: schematic, layout, pex or rcx.
+
 - `CACE{PDK_ROOT}`
 	
 	> The path to the directory containing the PDK
@@ -49,6 +49,10 @@ that is substituted by CACE. The syntax follows three essential rules:
 	> This is substituted with the simulation index.  Most often
 	used as a filename suffix for the output data file.
 
+- `CACE{random}`
+	
+	> A random integer number.
+
 - `CACE{cond=value}`
 	
 		For any condition cond, this form indicates that "value" is