Hello Jorge,
Thx for advices
It works

in VelocityTaglib class:
public String breadcrumb() throws Exception {
_res.recycle();
BreadcrumbTag.doTag(_ctx, _req, _res);
return _res.getString();
}
in BreadcrumbTag class:
public static void doTag(ServletContext ctx, HttpServletRequest req,
HttpServletResponse res)
throws IOException, ServletException {
RequestDispatcher rd = ctx.getRequestDispatcher(_PAGE);
rd.include(req, res);
}
and now I've got a nice breadcrumb in my navigation.vm

<div id="navigation" >
<table width="100%" cellpadding="10">
<tr valign="middle">
<td style="padding-left: 10px;">
$theme.breadcrumb()
</td>
<td align="right">
<div id="search_window">
$theme.journalContentSearch()
</div>
</td>
</tr>
</table>
</div>
Please sign in to flag this as inappropriate.