<loadfile property="xquery" srcFile="wzb.xq"/>
<xdb:xquery  xmlns:xdb="http://exist-db.org/ant"
    uri="xmldb:exist://localhost:8080/exist/xmlrpc/db" query="${xquery}"
    user="guest" password="guest-passwd">
      <variable name="alpha" value="aaa-alep" />
</xdb:xquery>