Thanx to Mr Joris Gillis who answered me last time very well....
Joris with your information I made a step more.

But the problem now is that I've to create a Periodic Table of Elements ....
something like this


<?xml version="1.0" standalone="yes"?>
<?xml-stylesheet type="text/xsl" href="NGroup2.xsl" ?>
<TAVOLA_PERIODICA_ELEMENTI>
 <GRUPPO N="IA" N2="1">
  <PERIODO N="1" POSIZIONE="1_1">
   <INFORMAZIONI>
    <SIMBOLO>H</SIMBOLO>
    <HISTORY>bla bla bla blka</HISTORY>
    <OTHER_INFORMATION>   BLA BLA BLA </OTHER_INFORMATION>
   </INFORMAZIONI>
  </PERIODO>
  <PERIODO N="1" POSIZIONE="2_1">
   <INFORMAZIONI>
    <SIMBOLO>Li</SIMBOLO>
    <HISTORY>bla bla bla blka</HISTORY>
    <OTHER_INFORMATION>   BLA BLA BLA </OTHER_INFORMATION>
   </INFORMAZIONI>
  </PERIODO>
 </GRUPPO>
</TAVOLA_PERIODICA_ELEMENTI>

I have to visualize only the <SIMBOLO> Node Like you showed me....
in the first row..... only Hidrogen in row1col1 and Helium in last cell of
table at the right margin..
and empty cells bitween .. and so on for other elements.

Next step is to open a popup with all information of every element, and I've
found a javascript code that do it well... the trouble is to understand in
what node I'm.

I Hope I made myself clear...

Thanx to all that will spend a bit of time for answering me.

I don't know XMLSpy">XMLSpy and altova enterprise edition.... Someone knows if it
can do everything I need?

Bye

J