diff --git a/manual/docs/Hierarchical data - Materialized path - Introduction.php b/manual/docs/Hierarchical data - Materialized path - Introduction.php
deleted file mode 100644
index e22100a60..000000000
--- a/manual/docs/Hierarchical data - Materialized path - Introduction.php	
+++ /dev/null
@@ -1 +0,0 @@
-Not yet implemented
\ No newline at end of file
diff --git a/manual/docs/Hierarchical data - Adjacency list - Node support.php b/manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Node support.php
similarity index 100%
rename from manual/docs/Hierarchical data - Adjacency list - Node support.php
rename to manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Node support.php
diff --git a/manual/docs/Hierarchical data - Adjacency list - Read me.php b/manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Read me.php
similarity index 100%
rename from manual/docs/Hierarchical data - Adjacency list - Read me.php
rename to manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Read me.php
diff --git a/manual/docs/Hierarchical data - Adjacency list - Setting up.php b/manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Setting up.php
similarity index 100%
rename from manual/docs/Hierarchical data - Adjacency list - Setting up.php
rename to manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Setting up.php
diff --git a/manual/docs/Hierarchical data - Adjacency list - Tree options.php b/manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Tree options.php
similarity index 100%
rename from manual/docs/Hierarchical data - Adjacency list - Tree options.php
rename to manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Tree options.php
diff --git a/manual/docs/Hierarchical data - Adjacency list - Tree support.php b/manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Tree support.php
similarity index 100%
rename from manual/docs/Hierarchical data - Adjacency list - Tree support.php
rename to manual/docs/Object relational mapping - Hierarchical data - Adjacency list - Tree support.php
diff --git a/manual/docs/Hierarchical data - Examples.php b/manual/docs/Object relational mapping - Hierarchical data - Examples.php
similarity index 100%
rename from manual/docs/Hierarchical data - Examples.php
rename to manual/docs/Object relational mapping - Hierarchical data - Examples.php
diff --git a/manual/docs/Hierarchical data - Introduction - About.php b/manual/docs/Object relational mapping - Hierarchical data - Introduction - About.php
similarity index 100%
rename from manual/docs/Hierarchical data - Introduction - About.php
rename to manual/docs/Object relational mapping - Hierarchical data - Introduction - About.php
diff --git a/manual/docs/Hierarchical data - Introduction - Node interface.php b/manual/docs/Object relational mapping - Hierarchical data - Introduction - Node interface.php
similarity index 100%
rename from manual/docs/Hierarchical data - Introduction - Node interface.php
rename to manual/docs/Object relational mapping - Hierarchical data - Introduction - Node interface.php
diff --git a/manual/docs/Hierarchical data - Introduction - Read me.php b/manual/docs/Object relational mapping - Hierarchical data - Introduction - Read me.php
similarity index 100%
rename from manual/docs/Hierarchical data - Introduction - Read me.php
rename to manual/docs/Object relational mapping - Hierarchical data - Introduction - Read me.php
diff --git a/manual/docs/Hierarchical data - Introduction - Setting up.php b/manual/docs/Object relational mapping - Hierarchical data - Introduction - Setting up.php
similarity index 100%
rename from manual/docs/Hierarchical data - Introduction - Setting up.php
rename to manual/docs/Object relational mapping - Hierarchical data - Introduction - Setting up.php
diff --git a/manual/docs/Hierarchical data - Introduction - Traversing or Walking Trees.php b/manual/docs/Object relational mapping - Hierarchical data - Introduction - Traversing or Walking Trees.php
similarity index 100%
rename from manual/docs/Hierarchical data - Introduction - Traversing or Walking Trees.php
rename to manual/docs/Object relational mapping - Hierarchical data - Introduction - Traversing or Walking Trees.php
diff --git a/manual/docs/Hierarchical data - Introduction - Tree interface.php b/manual/docs/Object relational mapping - Hierarchical data - Introduction - Tree interface.php
similarity index 100%
rename from manual/docs/Hierarchical data - Introduction - Tree interface.php
rename to manual/docs/Object relational mapping - Hierarchical data - Introduction - Tree interface.php
diff --git a/manual/docs/Hierarchical data - Introduction.php b/manual/docs/Object relational mapping - Hierarchical data - Introduction.php
similarity index 100%
rename from manual/docs/Hierarchical data - Introduction.php
rename to manual/docs/Object relational mapping - Hierarchical data - Introduction.php
diff --git a/manual/docs/Hierarchical data - Adjacency list - Introduction.php b/manual/docs/Object relational mapping - Hierarchical data - Materialized path - Introduction.php
similarity index 100%
rename from manual/docs/Hierarchical data - Adjacency list - Introduction.php
rename to manual/docs/Object relational mapping - Hierarchical data - Materialized path - Introduction.php
diff --git a/manual/docs/Hierarchical data - Nested set - Introduction.php b/manual/docs/Object relational mapping - Hierarchical data - Nested set - Introduction.php
similarity index 100%
rename from manual/docs/Hierarchical data - Nested set - Introduction.php
rename to manual/docs/Object relational mapping - Hierarchical data - Nested set - Introduction.php
diff --git a/manual/docs/Hierarchical data - Nested set - Node support.php b/manual/docs/Object relational mapping - Hierarchical data - Nested set - Node support.php
similarity index 100%
rename from manual/docs/Hierarchical data - Nested set - Node support.php
rename to manual/docs/Object relational mapping - Hierarchical data - Nested set - Node support.php
diff --git a/manual/docs/Hierarchical data - Nested set - Read me.php b/manual/docs/Object relational mapping - Hierarchical data - Nested set - Read me.php
similarity index 100%
rename from manual/docs/Hierarchical data - Nested set - Read me.php
rename to manual/docs/Object relational mapping - Hierarchical data - Nested set - Read me.php
diff --git a/manual/docs/Hierarchical data - Nested set - Setting up.php b/manual/docs/Object relational mapping - Hierarchical data - Nested set - Setting up.php
similarity index 100%
rename from manual/docs/Hierarchical data - Nested set - Setting up.php
rename to manual/docs/Object relational mapping - Hierarchical data - Nested set - Setting up.php
diff --git a/manual/docs/Hierarchical data - Nested set - Tree options.php b/manual/docs/Object relational mapping - Hierarchical data - Nested set - Tree options.php
similarity index 100%
rename from manual/docs/Hierarchical data - Nested set - Tree options.php
rename to manual/docs/Object relational mapping - Hierarchical data - Nested set - Tree options.php
diff --git a/manual/docs/Hierarchical data - Nested set - Tree support.php b/manual/docs/Object relational mapping - Hierarchical data - Nested set - Tree support.php
similarity index 100%
rename from manual/docs/Hierarchical data - Nested set - Tree support.php
rename to manual/docs/Object relational mapping - Hierarchical data - Nested set - Tree support.php