--- a/doc/tutorials/advanced/part01_create-cube.rst	Wed Mar 18 11:45:35 2020 +0100
+++ b/doc/tutorials/advanced/part01_create-cube.rst	Wed Mar 18 11:29:30 2020 +0100
@@ -33,7 +33,6 @@
 Enter a short description and this will create your new cube in the
 `cubicweb-sytweb` folder.
 
-
 .. _adv_tuto_assemble_cubes:
 
 Step 3: pick building blocks into existing cubes
@@ -50,9 +49,6 @@
 * `file <https://www.cubicweb.org/project/cubicweb-file>`_, containing `File`
   entity type, gallery view, and a file system import utility.
 
-* `zone <https://www.cubicweb.org/project/cubicweb-zone>`_, containing the
-  `Zone` entity type for hierarchical geographical zones. Entities (including
-  sub-zones) are added to a given zone using the `situated_in` relation.
 
 * `person <https://www.cubicweb.org/project/cubicweb-person>`_, containing the
   `Person` entity type plus some basic views.
@@ -75,8 +71,8 @@
                    'cubicweb-folder': '>= 1.1.0',
                    'cubicweb-person': '>= 1.2.0',
                    'cubicweb-comment': '>= 1.2.0',
-                   'cubicweb-tag': '>= 1.2.0',
-                   'cubicweb-zone': None}
+                   'cubicweb-tag': '>= 1.2.0'
+                   }
 
 Notice that you can express minimal version of the cube that should be used,
 `None` meaning whatever version available. All packages starting with 'cubicweb-'
@@ -122,11 +118,6 @@
         object = 'Folder'
 
 
-    class situated_in(RelationDefinition):
-        subject = 'File'
-        object = 'Zone'
-
-
     class displayed_on(RelationDefinition):
         subject = 'Person'
         object = 'File'