-2:8:
-unexpected end of input
-expecting <title> or class=
+
+<?xml-model type="application/relax-ng-compact-syntax"
+ href="./schema/dtc.rnc"?>
+
+<document>
+ <about>
+ <title>sec1</title>
+ </about>
+ <section id="sec2">
+ <title>sec2</title>
+ </section>
+ <section id="sec3">
+ <title>sec3</title>
+ </section>
+</document>
\ No newline at end of file