diff --git a/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/i_time_series.md b/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/i_time_series.md
new file mode 100644
index 0000000000000000000000000000000000000000..def2e4e1948f286018f475ace2697c838ff8ea85
--- /dev/null
+++ b/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/i_time_series.md
@@ -0,0 +1,2 @@
+Contains time series information. Each entry consists of a pair of time and
+parameter name. Values of the parameter are piecewise linear interpolated.
diff --git a/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/i_pair.md b/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/i_pair.md
new file mode 100644
index 0000000000000000000000000000000000000000..f5cdda5581f84d84cb280271b53e922190e3d253
--- /dev/null
+++ b/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/i_pair.md
@@ -0,0 +1 @@
+Contains pair of time and parameter name.
diff --git a/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/t_parameter_name.md b/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/t_parameter_name.md
new file mode 100644
index 0000000000000000000000000000000000000000..646f1b237dca871cd6c05e2b5044e3177aef27b2
--- /dev/null
+++ b/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/t_parameter_name.md
@@ -0,0 +1,3 @@
+Specification of the parameter name. The specified parameter have to be time
+independent, i.e., it must neither be a CurvedParameter nor a
+TimeDependentHeterogeneousParameter.
diff --git a/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/t_time.md b/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/t_time.md
new file mode 100644
index 0000000000000000000000000000000000000000..dec5b818b0035b1ed1c010d2fdfb35842cb6d356
--- /dev/null
+++ b/Documentation/ProjectFile/prj/parameters/parameter/TimeDependentHeterogeneousParameter/time_series/pair/t_time.md
@@ -0,0 +1 @@
+Specification of point in time in the time-parameter-name relation.
diff --git a/ParameterLib/TimeDependentHeterogeneousParameter.cpp b/ParameterLib/TimeDependentHeterogeneousParameter.cpp
index ecae53379e5fe18243122dbc58594f96208cb12c..9c27cd23aa6803551ec0798d7c890c5f488d8589 100644
--- a/ParameterLib/TimeDependentHeterogeneousParameter.cpp
+++ b/ParameterLib/TimeDependentHeterogeneousParameter.cpp
@@ -108,15 +108,18 @@ std::unique_ptr<ParameterBase> createTimeDependentHeterogeneousParameter(
     //! \ogs_file_param{prj__parameters__parameter__type}
     config.checkConfigParameter("type", "TimeDependentHeterogeneousParameter");
     auto const time_series_config =
-        //!  //\ogs_file_param{prj__parameters__parameter__TimeDependentHeterogeneousParameter__time_serie}
+        //! \ogs_file_param{prj__parameters__parameter__TimeDependentHeterogeneousParameter__time_series}
         config.getConfigSubtree("time_series");
 
     std::vector<TimeDependentHeterogeneousParameter::PairTimeParameterName>
         time_series;
+    //! \ogs_file_param{prj__parameters__parameter__TimeDependentHeterogeneousParameter__time_series__pair}
     for (auto const p : time_series_config.getConfigSubtreeList("pair"))
     {
+        //! \ogs_file_param{prj__parameters__parameter__TimeDependentHeterogeneousParameter__time_series__pair__time}
         auto time = p.getConfigParameter<double>("time");
         auto parameter_name =
+        //! \ogs_file_param{prj__parameters__parameter__TimeDependentHeterogeneousParameter__time_series__pair__parameter_name}
             p.getConfigParameter<std::string>("parameter_name");
         time_series.emplace_back(time, parameter_name);
     }