Add <fd> to xml-xcb.txt

Signed-off-by: Ran Benita <ran234@gmail.com>
Reviewed-by: Daniel Martin <consume.noise@gmail.com>

diff --git a/doc/xml-xcb.txt b/doc/xml-xcb.txt
index 7311911..97ce5bf 100644 (file)
--- a/doc/xml-xcb.txt
+++ b/doc/xml-xcb.txt
@@ -201,6 +201,14 @@ enum; the value is restricted to one of the constants named in the enum.
   declares the data type of the field, and the name attribute gives the name
   of the field.
 
   declares the data type of the field, and the name attribute gives the name
   of the field.
 

+<fd name="identifier" />
+
+  This element represents a file descriptor field passed with the request.  The
+  name attribute gives the name of the field.
+
+  While ordinary fields are encoded as part of the request, file descriptor
+  fields are generally passed via an out-of-band mechanism.
+

 <list type="identifier" name="identifier">expression</list>
 
   This element represents an array or list of fields in a data structure.  The
 <list type="identifier" name="identifier">expression</list>
 
   This element represents an array or list of fields in a data structure.  The