diff --git a/.gitignore b/.gitignore
index 709fd09..bd06561 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ package-lock.json
 /bower_components/
 /node_modules/
 /output/
+/generated-docs/
diff --git a/src/Web/DOM/Document.purs b/src/Web/DOM/Document.purs
index fe83b76..8fbb3d8 100644
--- a/src/Web/DOM/Document.purs
+++ b/src/Web/DOM/Document.purs
@@ -1,3 +1,11 @@
+-- | This module provides type definitions and implementations for the
+-- | `Document` interface, which is part of the W3C DOM API.
+-- |
+-- | The DOM API doesn't actually give you any way of getting hold of a
+-- | `Document` by itself. To do that, you will need to look at one of the
+-- | other APIs which build on the DOM API. For example, `window.document` is
+-- | part of the HTML5 API, and so the relevant binding can be found in
+-- | `Web.HTML.Window`, which is part of the `purescript-web-html` package.
 module Web.DOM.Document
   ( Document
   , fromNode