diff --git a/Documentation/ProjectFile/material/solid/constitutive_relation/i_constitutive_relation.md b/Documentation/ProjectFile/material/solid/constitutive_relation/i_constitutive_relation.md
index 576add64edccf5d980a0ff86143dc43a7109a788..8edd2122296e2d58f781c598331929903aaf3933 100644
--- a/Documentation/ProjectFile/material/solid/constitutive_relation/i_constitutive_relation.md
+++ b/Documentation/ProjectFile/material/solid/constitutive_relation/i_constitutive_relation.md
@@ -1 +1 @@
-\ogs_missing_documentation
+Description of the solid properties using constitutive relations.
diff --git a/Documentation/ProjectFile/material/solid/constitutive_relation/t_type.md b/Documentation/ProjectFile/material/solid/constitutive_relation/t_type.md
index 576add64edccf5d980a0ff86143dc43a7109a788..df9ef9584f8fb1edc035d54811ee0abdbc332d7d 100644
--- a/Documentation/ProjectFile/material/solid/constitutive_relation/t_type.md
+++ b/Documentation/ProjectFile/material/solid/constitutive_relation/t_type.md
@@ -1 +1,4 @@
-\ogs_missing_documentation
+The constitutive relation type.
+See constitutive relation \ref
+ogs_file_param__material__solid__constitutive_relation "cases" for available
+options.
diff --git a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation b/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation
new file mode 120000
index 0000000000000000000000000000000000000000..cfcb5e03bbe20c629c87a7f4d1fb7ac0fea2e1d3
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation
@@ -0,0 +1 @@
+../../../../material/solid/constitutive_relation
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation/i_constitutive_relation.md b/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation/i_constitutive_relation.md
deleted file mode 100644
index 8e7925f0d029ab08752e52395c902df2725e52e9..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation/i_constitutive_relation.md
+++ /dev/null
@@ -1 +0,0 @@
-\copydoc ProcessLib::HydroMechanics::HydroMechanicsProcessData::material
diff --git a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation/t_type.md b/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation/t_type.md
deleted file mode 100644
index d7c7defae9637e69f0a97762bd68752fcf46bf75..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS/constitutive_relation/t_type.md
+++ /dev/null
@@ -1,3 +0,0 @@
-The type of constitutive relation. See
-ProcessLib::HydroMechanics::createHydroMechanicsProcess()
-for available implementations.
diff --git a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation b/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation
new file mode 120000
index 0000000000000000000000000000000000000000..cfcb5e03bbe20c629c87a7f4d1fb7ac0fea2e1d3
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation
@@ -0,0 +1 @@
+../../../../material/solid/constitutive_relation
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation/i_constitutive_relation.md b/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation/i_constitutive_relation.md
deleted file mode 100644
index 576add64edccf5d980a0ff86143dc43a7109a788..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation/i_constitutive_relation.md
+++ /dev/null
@@ -1 +0,0 @@
-\ogs_missing_documentation
diff --git a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation/t_type.md b/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation/t_type.md
deleted file mode 100644
index 576add64edccf5d980a0ff86143dc43a7109a788..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/HYDRO_MECHANICS_WITH_LIE/constitutive_relation/t_type.md
+++ /dev/null
@@ -1 +0,0 @@
-\ogs_missing_documentation
diff --git a/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation b/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation
new file mode 120000
index 0000000000000000000000000000000000000000..cfcb5e03bbe20c629c87a7f4d1fb7ac0fea2e1d3
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation
@@ -0,0 +1 @@
+../../../../material/solid/constitutive_relation
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation/i_constitutive_relation.md b/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation/i_constitutive_relation.md
deleted file mode 100644
index 4a2457d3f4c6929e8670842215d3ab145424d306..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation/i_constitutive_relation.md
+++ /dev/null
@@ -1 +0,0 @@
-The constitutive relation for the brittle fracture.
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation/t_type.md b/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation/t_type.md
deleted file mode 100644
index c66714fc4af7a6a2e11c293f1bc98e75a4c7c09c..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/PHASE_FIELD/constitutive_relation/t_type.md
+++ /dev/null
@@ -1,2 +0,0 @@
-The type of constitutive relation available.
-1. Linear elastic
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation b/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation
new file mode 120000
index 0000000000000000000000000000000000000000..cfcb5e03bbe20c629c87a7f4d1fb7ac0fea2e1d3
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation
@@ -0,0 +1 @@
+../../../../material/solid/constitutive_relation
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation/i_constitutive_relation.md b/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation/i_constitutive_relation.md
deleted file mode 100644
index 576add64edccf5d980a0ff86143dc43a7109a788..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation/i_constitutive_relation.md
+++ /dev/null
@@ -1 +0,0 @@
-\ogs_missing_documentation
diff --git a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation/t_type.md b/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation/t_type.md
deleted file mode 100644
index 576add64edccf5d980a0ff86143dc43a7109a788..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION/constitutive_relation/t_type.md
+++ /dev/null
@@ -1 +0,0 @@
-\ogs_missing_documentation
diff --git a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation b/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation
new file mode 120000
index 0000000000000000000000000000000000000000..cfcb5e03bbe20c629c87a7f4d1fb7ac0fea2e1d3
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation
@@ -0,0 +1 @@
+../../../../material/solid/constitutive_relation
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation/i_constitutive_relation.md b/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation/i_constitutive_relation.md
deleted file mode 100644
index 576add64edccf5d980a0ff86143dc43a7109a788..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation/i_constitutive_relation.md
+++ /dev/null
@@ -1 +0,0 @@
-\ogs_missing_documentation
diff --git a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation/t_type.md b/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation/t_type.md
deleted file mode 100644
index 576add64edccf5d980a0ff86143dc43a7109a788..0000000000000000000000000000000000000000
--- a/Documentation/ProjectFile/prj/processes/process/SMALL_DEFORMATION_WITH_LIE/constitutive_relation/t_type.md
+++ /dev/null
@@ -1 +0,0 @@
-\ogs_missing_documentation