diff --git a/src/compositor/mod.rs b/src/compositor/mod.rs
index 2ba51a7..927401c 100644
--- a/src/compositor/mod.rs
+++ b/src/compositor/mod.rs
@@ -60,19 +60,19 @@
 //!
 //! // Instanciate the CompositorHandler and give it to the event loop
 //! let compositor_hid = event_loop.add_handler_with_init(
-//!     MyCompositorHandler::new(Myhandler::new())
+//!     MyCompositorHandler::new(MyHandler{ /* ... */ }, None /* put a logger here */)
 //! );
 //!
 //! // Register it as a handler for wl_compositor
-//! event_loop.register_global::<WlCompositor, MyCompositorHandler>(compositor_hid);
+//! event_loop.register_global::<WlCompositor, MyCompositorHandler>(compositor_hid, 4);
 //!
 //! // Register it as a handler for wl_subcompositor
-//! event_loop.register_global::<WlSubcompositor, MyCompositorHandler>(compositor_hid);
+//! event_loop.register_global::<WlSubcompositor, MyCompositorHandler>(compositor_hid, 1);
 //!
 //! // retrieve the token needed to access the surfaces' metadata
 //! let compositor_token = {
 //!     let state = event_loop.state();
-//!     state.get_handler::<MyCompositorHandler>>(handler_id).get_token()
+//!     state.get_handler::<MyCompositorHandler>(compositor_hid).get_token()
 //! };
 //!
 //! // You're now ready to go!
@@ -110,7 +110,7 @@ pub enum Damage {
     Full,
     /// A rectangle containing the damaged zone, in surface coordinates
     Surface(Rectangle),
-    /// A rectangle containing the smaazed zone, in buffer coordinates
+    /// A rectangle containing the damaged zone, in buffer coordinates
     ///
     /// Note: Buffer scaling must be taken into consideration
     Buffer(Rectangle),
@@ -435,9 +435,21 @@ impl<U, H> CompositorHandler<U, H> {
 /// at creation of the `CompositorHandler`.
 #[allow(unused_variables)]
 pub trait Handler {
-    /// See `wayland_server::protocol::wl_surface::Handler::commit`
+    /// The double-buffered state has been validated by the client
+    ///
+    /// At this point, the pending state that has been accumulated in the `SurfaceAttributes` associated
+    /// to this surface should be integrated into the current state of the surface.
+    ///
+    /// See [`wayland_server::protocol::wl_surface::Handler::commit`](https://docs.rs/wayland-server/*/wayland_server/protocol/wl_surface/trait.Handler.html#method.commit)
+    /// for more details
     fn commit(&mut self, evlh: &mut EventLoopHandle, client: &Client, surface: &wl_surface::WlSurface) {}
-    /// See `wayland_server::protocol::wl_surface::Handler::frame`
+    /// The client asks to be notified when would be a good time to update the contents of this surface
+    ///
+    /// You must keep the provided `WlCallback` and trigger it at the appropriate time by calling
+    /// its `done()` method.
+    ///
+    /// See [`wayland_server::protocol::wl_surface::Handler::frame`](https://docs.rs/wayland-server/*/wayland_server/protocol/wl_surface/trait.Handler.html#method.frame)
+    /// for more details
     fn frame(&mut self, evlh: &mut EventLoopHandle, client: &Client, surface: &wl_surface::WlSurface,
              callback: wl_callback::WlCallback) {
     }
diff --git a/src/compositor/tree.rs b/src/compositor/tree.rs
index a78558f..8a77bd3 100644
--- a/src/compositor/tree.rs
+++ b/src/compositor/tree.rs
@@ -35,7 +35,7 @@ pub enum RoleStatus {
     /// This surface does not have any role
     NoRole,
     /// This surface is a subsurface
-    Sursurface,
+    Subsurface,
     /// This surface has a role other than subsurface
     ///
     /// It is thus the root of a subsurface tree that will
@@ -102,7 +102,7 @@ impl<U> SurfaceData<U> {
         let data_mutex = Self::get_data(surface);
         let data_guard = data_mutex.lock().unwrap();
         match (data_guard.has_role, data_guard.parent.is_some()) {
-            (true, true) => RoleStatus::Sursurface,
+            (true, true) => RoleStatus::Subsurface,
             (true, false) => RoleStatus::HasRole,
             (false, false) => RoleStatus::NoRole,
             (false, true) => unreachable!(),