I'd like to have Ant automatically include or import resources matching a particular pattern, but I'm really struggling with the syntax. Here's what I've tried:

<import>
    <fileset dir="${basedir}" includes="*-graph.xml" />
</import>

However, I just get the error message

import requires file attribute or at least one nested resource

The documentation for import (and include) both say that you can use a nested resource collection, and the documentation for resource collections says <fileset> is a resource collection. I've Googled and can't find any useful examples at all.

I'm using Ant 1.8.1 (verified with ant -version)