diff -r 6c2ec23b8f47 -r 49b311800e28 short.conf
--- a/short.conf	Thu Jul 02 15:09:45 2015 +0200
+++ b/short.conf	Sun Jul 05 22:52:36 2015 +0200
@@ -14,9 +14,15 @@
 [eximopt-inlinemacro]
 <code>{target}</code>
 
+# eximdriver
 [eximdriver-inlinemacro]
 <strong>{target}</strong>
 
+ifdef::backend-docbook[]
+[eximdriver-inlinemacro]
+<emphasis>{target}</emphasis>
+endif::backend-docbook[]
+
 [macros]
 (?u)\b(i):(?P<target>[\$\w]+)=eximvar[]
 (?u)\b(o):(?P<target>\w+)=eximopt[]