[gspell] docs: create categories in the API reference

[Sébastien Wilmet <swilmet src gnome org>]

commit 3ce242e0caa87ecb5cf2eb4ea1e8276a42252d11
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Nov 19 13:42:04 2015 +0100

    docs: create categories in the API reference

 docs/reference/gspell-docs.xml |   38 +++++++++++++++++++++++++++-----------
 1 files changed, 27 insertions(+), 11 deletions(-)
---
diff --git a/docs/reference/gspell-docs.xml b/docs/reference/gspell-docs.xml
index 99b1fea..486c7f0 100644
--- a/docs/reference/gspell-docs.xml
+++ b/docs/reference/gspell-docs.xml
@@ -12,18 +12,34 @@
     <releaseinfo>for gspell &package_version;</releaseinfo>
   </bookinfo>
 
-  <chapter>
+  <part>
     <title>API reference</title>
-    <xi:include href="xml/checker.xml"/>
-    <xi:include href="xml/checker-dialog.xml"/>
-    <xi:include href="xml/inline-checker-gtv.xml"/>
-    <xi:include href="xml/language.xml"/>
-    <xi:include href="xml/language-chooser.xml"/>
-    <xi:include href="xml/language-chooser-button.xml"/>
-    <xi:include href="xml/language-chooser-dialog.xml"/>
-    <xi:include href="xml/navigator.xml"/>
-    <xi:include href="xml/navigator-gtv.xml"/>
-  </chapter>
+
+    <chapter>
+      <title>Main Classes</title>
+      <xi:include href="xml/checker.xml"/>
+      <xi:include href="xml/language.xml"/>
+    </chapter>
+
+    <chapter>
+      <title>Inline Checkers</title>
+      <xi:include href="xml/inline-checker-gtv.xml"/>
+    </chapter>
+
+    <chapter>
+      <title>External Checkers</title>
+      <xi:include href="xml/checker-dialog.xml"/>
+      <xi:include href="xml/navigator.xml"/>
+      <xi:include href="xml/navigator-gtv.xml"/>
+    </chapter>
+
+    <chapter>
+      <title>Language Choosers</title>
+      <xi:include href="xml/language-chooser.xml"/>
+      <xi:include href="xml/language-chooser-button.xml"/>
+      <xi:include href="xml/language-chooser-dialog.xml"/>
+    </chapter>
+  </part>
 
   <chapter id="object-tree">
     <title>Object Hierarchy</title>