+
+# ditto for XHTML 1.1 (asciidoc generates that)
+cat - <<'_EOF' | xmllint 2>/dev/null --nonet --postvalid --noout - || exit 77
+<?xml version="1.0" encoding="US-ASCII"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+ <head><title /></head><body><p></p></body></html>
+_EOF
+