+ (string-append "@end ifnottex
+
+@ifhtml
+@ifclear bigpage
+This document is also available as a
+@uref{source/Documentation/internals.pdf,PDF} and as
+@uref{source/Documentation/internals-big-page.html,one big page}.
+@end ifclear
+@ifset bigpage
+This document is also available as a
+@uref{source/Documentation/internals.pdf,PDF} and as a
+@uref{source/Documentation/internals/index.html,HTML indexed multiple pages}.
+@end ifset
+@end ifhtml
+
+This is the Internals Reference (IR) for version "