How to pass values from JSP to TagLib attributes dynamicaly

HI there
first of all thank you for your help, I have already read a lot in your forums and learned a lot too!
here my problem:
i want a jsp page to pass attributes to a taglib dynamicaly
my tld file looks like that:
<!DOCTYPE taglib PUBLIC
"-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1.1.dtd">
<taglib>
<tlibversion>1.0</tlibversion>
<jspversion>1.1</jspversion>
<shortname>mdu tags</shortname>
<uri></uri>
<info>Tag Library Marek</info>
<tag>
<name>treeview</name>
<tagclass>com.mdu.projects.treeview.MduTreeView</tagclass>
<bodycontent>empty</bodycontent>
<attribute>
<name>expandPath</name>
<required>false</required>
<rtexprvalue>false</rtexprvalue>
</attribute>
</tag>
</taglib>
my jsp page looks like that:
<%@ taglib uri="/WEB-INF/mdutags.tld" prefix="mdutags" %>
<HTML stuff...>
<%!
String test = "1,2,3,4";
%>
<mdutags:treeview expandPath="<%= test %>" /> <.../HTML stuff...>
The String expandPath in my "Treeview" is "<%= test %>" not "1,2,3,4"
does anyone know what i am doing wrong?what have i to do pass jsp variables to taglibs?
greetings,
sorry for my clumsy english
Marek

Hello, could you write the tld entry for this tag.

Marek, the tag mechanism is doing exactly what you told it to do.
With

you told the tag mechamism not to accept run-time expressions. If you want to be able to use run-time expressions for the attribute, you need to change the setting to "true".
hth,
bear

Welcome to the Ranch eballosa!
You'll find this forum a great place to seek help on JSP pages, and there aren't many rules you'll have to worry about, but one is that proper names are required. Please take a look at the JavaRanch Naming Policy and change your display name to match it.
Thanks!
bear
JSP Fourm Bartender

Thank you very much!
now i understand this <rtxexprvalue> tag