ref-manual: Edits to the image-live class description.

Fixes [YOCTO #605]

I added an example showing what the user would need to do in order
to build an ISO file.  This seemed to be the best existing place
in the YP docs to get this information in.

(From yocto-docs rev: a715c28e533f723e0c2d4ab4d33b86b93fa2d66b)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index fae0c7832b..babe9bd2d6 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -1154,9 +1154,17 @@
     <para>
         The <filename>image-live</filename> class supports building "live"
         images.
+    </para>
+
+    <para>
         Normally, you do not use this class directly.
         Instead, you add "live" to
         <link linkend='var-IMAGE_FSTYPES'><filename>IMAGE_FSTYPES</filename></link>.
+        For example, if you were building an ISO image, you would add "live"
+        to <filename>IMAGE_FSTYPES</filename>, set the
+        <link linkend='var-NOISO'><filename>NOISO</filename></link> variable to
+        "0" and the build system would use the <filename>image-live</filename>
+        class to build the ISO image.
     </para>
 </section>