diff --git a/usb_hid_item/README.md b/usb_hid_item/README.md
index bf5c8b6..3dda5fc 100644
--- a/usb_hid_item/README.md
+++ b/usb_hid_item/README.md
@@ -2,6 +2,8 @@
 
 ## Example
 
+### Using items directly
+
 ```rs
 const QEMU_USB_TABLET: &[u8] = &[
 	0x05, 0x01, 0x09, 0x02, 0xa1, 0x01, 0x09, 0x01, 0xa1, 0x00, 0x05, 0x09, 0x19, 0x01, 0x29,
@@ -11,7 +13,42 @@ const QEMU_USB_TABLET: &[u8] = &[
 	0x25, 0x7f, 0x35, 0x00, 0x45, 0x00, 0x75, 0x08, 0x95, 0x01, 0x81, 0x06, 0xc0, 0xc0,
 ];
 
-dbg!(usb_hid_report_descriptor::parse(QEMU_USB_TABLET).collect::<Vec<_>>());
+dbg!(usb_hid_item::parse(QEMU_USB_TABLET).collect::<Vec<_>>());
+```
+
+### Using the tree parser
+
+```rs
+const QEMU_USB_TABLET: &[u8] = &[
+	0x05, 0x01, 0x09, 0x02, 0xa1, 0x01, 0x09, 0x01, 0xa1, 0x00, 0x05, 0x09, 0x19, 0x01, 0x29,
+	0x03, 0x15, 0x00, 0x25, 0x01, 0x95, 0x03, 0x75, 0x01, 0x81, 0x02, 0x95, 0x01, 0x75, 0x05,
+	0x81, 0x01, 0x05, 0x01, 0x09, 0x30, 0x09, 0x31, 0x15, 0x00, 0x26, 0xff, 0x7f, 0x35, 0x00,
+	0x46, 0xff, 0x7f, 0x75, 0x10, 0x95, 0x02, 0x81, 0x02, 0x05, 0x01, 0x09, 0x38, 0x15, 0x81,
+	0x25, 0x7f, 0x35, 0x00, 0x45, 0x00, 0x75, 0x08, 0x95, 0x01, 0x81, 0x06, 0xc0, 0xc0,
+];
+
+use {
+	usb_hid_item::tree::{Value, Field},
+	core::{mem, ops::RangeInclusive},
+};
+
+type Usages = Vec<(u16, RangeInclusive<u16>)>;
+
+let mut report = Vec::new();
+let mut usages = Usages::new();
+
+fn f(val: Value, fields: &mut Vec<(Usages, Field)>, usages: &mut Usages) {
+	match val {
+		Value::Collection(c) => c.for_each(|c| f(val.unwrap(), fields, usages)),
+		Value::Usage { page, ids } => usages.push((page, ids)),
+		Value::Field(f) => fields.push((mem::take(usages), f)),
+	}
+}
+usb_hid_item::tree::parse(data)
+	.iter()
+	.for_each(|c| f(c.unwrap(), &mut fields, &mut usages));
+
+dbg!(fields);
 ```
 
 ## References