diff --git a/Documentation/ProjectFile/prj/process_variables/process_variable/boundary_conditions/boundary_condition/DirichletWithinTimeInterval/t_time_interval.md b/Documentation/ProjectFile/prj/process_variables/process_variable/boundary_conditions/boundary_condition/DirichletWithinTimeInterval/t_time_interval.md
new file mode 100644
index 0000000000000000000000000000000000000000..080f2c8ed6b2f1f663df1f7a217ee74b6cb44eb5
--- /dev/null
+++ b/Documentation/ProjectFile/prj/process_variables/process_variable/boundary_conditions/boundary_condition/DirichletWithinTimeInterval/t_time_interval.md
@@ -0,0 +1 @@
+\copydoc ogs_file_param__prj__time_loop__processes__process__time_interval
diff --git a/Documentation/ProjectFile/prj/time_loop/processes/process/time_interval/i_time_interval.md b/Documentation/ProjectFile/prj/time_loop/processes/process/time_interval/i_time_interval.md
new file mode 100644
index 0000000000000000000000000000000000000000..281ba277b430eaa2f3545aedd5277cabb0f197cb
--- /dev/null
+++ b/Documentation/ProjectFile/prj/time_loop/processes/process/time_interval/i_time_interval.md
@@ -0,0 +1 @@
+It defines a time interval.
diff --git a/Documentation/ProjectFile/prj/process_variables/process_variable/boundary_conditions/boundary_condition/DirichletWithinTimeInterval/t_end_time.md b/Documentation/ProjectFile/prj/time_loop/processes/process/time_interval/t_end_time.md
similarity index 100%
rename from Documentation/ProjectFile/prj/process_variables/process_variable/boundary_conditions/boundary_condition/DirichletWithinTimeInterval/t_end_time.md
rename to Documentation/ProjectFile/prj/time_loop/processes/process/time_interval/t_end_time.md
diff --git a/Documentation/ProjectFile/prj/process_variables/process_variable/boundary_conditions/boundary_condition/DirichletWithinTimeInterval/t_start_time.md b/Documentation/ProjectFile/prj/time_loop/processes/process/time_interval/t_start_time.md
similarity index 100%
rename from Documentation/ProjectFile/prj/process_variables/process_variable/boundary_conditions/boundary_condition/DirichletWithinTimeInterval/t_start_time.md
rename to Documentation/ProjectFile/prj/time_loop/processes/process/time_interval/t_start_time.md