diff --git a/map_machine/doc/__init__.py b/map_machine/doc/__init__.py
new file mode 100644
index 0000000..12eaacc
--- /dev/null
+++ b/map_machine/doc/__init__.py
@@ -0,0 +1,3 @@
+"""
+Documentation utilities.
+"""
diff --git a/map_machine/moire_manager.py b/map_machine/doc/moire_manager.py
similarity index 98%
rename from map_machine/moire_manager.py
rename to map_machine/doc/moire_manager.py
index e52a052..d329c37 100644
--- a/map_machine/moire_manager.py
+++ b/map_machine/doc/moire_manager.py
@@ -313,5 +313,5 @@ def convert(input_path: Path, output_path: Path) -> None:
 
 
 if __name__ == "__main__":
-    convert(Path("doc/readme.moi"), Path("README.md"))
-    convert(Path("doc/contributing.moi"), Path(".github/CONTRIBUTING.md"))
+    convert(Path("readme.moi"), Path("../../README.md"))
+    convert(Path("contributing.moi"), Path("../../.github/CONTRIBUTING.md"))
diff --git a/map_machine/taginfo.py b/map_machine/doc/taginfo.py
similarity index 100%
rename from map_machine/taginfo.py
rename to map_machine/doc/taginfo.py
diff --git a/map_machine/feature/__init__.py b/map_machine/feature/__init__.py
index e69de29..a34c92e 100644
--- a/map_machine/feature/__init__.py
+++ b/map_machine/feature/__init__.py
@@ -0,0 +1,3 @@
+"""
+Specific map features: roads, directions, etc.
+"""
diff --git a/map_machine/geometry/__init__.py b/map_machine/geometry/__init__.py
index e69de29..3b1a03f 100644
--- a/map_machine/geometry/__init__.py
+++ b/map_machine/geometry/__init__.py
@@ -0,0 +1,3 @@
+"""
+Map geometry: dealing with coordinates, projections.
+"""
diff --git a/map_machine/main.py b/map_machine/main.py
index ea9780e..2c381c9 100644
--- a/map_machine/main.py
+++ b/map_machine/main.py
@@ -58,7 +58,7 @@ def main() -> None:
 
     elif arguments.command == "taginfo":
         from map_machine.scheme import Scheme
-        from map_machine.taginfo import write_taginfo_project_file
+        from doc.taginfo import write_taginfo_project_file
 
         write_taginfo_project_file(Scheme(workspace.DEFAULT_SCHEME_PATH))
 
diff --git a/map_machine/osm/__init__.py b/map_machine/osm/__init__.py
index e69de29..31178c7 100644
--- a/map_machine/osm/__init__.py
+++ b/map_machine/osm/__init__.py
@@ -0,0 +1,3 @@
+"""
+OpenStreetMap-specific things.
+"""
diff --git a/map_machine/pictogram/__init__.py b/map_machine/pictogram/__init__.py
index e69de29..a667ec5 100644
--- a/map_machine/pictogram/__init__.py
+++ b/map_machine/pictogram/__init__.py
@@ -0,0 +1,3 @@
+"""
+Icons and points.
+"""
diff --git a/map_machine/slippy/__init__.py b/map_machine/slippy/__init__.py
index e69de29..80830f0 100644
--- a/map_machine/slippy/__init__.py
+++ b/map_machine/slippy/__init__.py
@@ -0,0 +1,3 @@
+"""
+Tiles generation for slippy maps.
+"""
diff --git a/map_machine/ui/__init__.py b/map_machine/ui/__init__.py
index e69de29..ef42fdf 100644
--- a/map_machine/ui/__init__.py
+++ b/map_machine/ui/__init__.py
@@ -0,0 +1,3 @@
+"""
+User interface.
+"""