Select a node by name in file with a parameter from another file

[wabr7030]

I have two xml file
1) xml source:
<Indici>
<F1>xxx</F1>
<F2>yyy</F2>
</Indici>
2) File colsDef.xml:

<Columns>
<Column>
<evento>F1</evento>
</Column>
</columns>

I want to take text of node where node name is defined in file colsDef.xml
I use this xsl:

<xsl:variable name="doc" select="document('colsDef.xml')"/>
<table>
<xsl:for-each select="Indici">
<tr>
<xsl:variable name="nodo" select="."/>
<xsl:for-each select="$doc/Columns/Column">
<td>
<xsl:variable name="evento" select="evento"/>
<!--HERE IS THE PROBLEM -->
<xsl:value-of select="$nodo[name()=$evento]"/>

</td>
</xsl:for-each>
</tr>
</xsl:for-each>
</table>

Can anyone help me?
Thank you

[David Carlisle]

<xsl:for-each select="Indici">

so here the current node has name Indici, and that's the node that gets
saved in nodo:

<xsl:variable name="nodo" select="."/>
so this

<xsl:value-of select="$nodo[name()=$evento]"/>

will be empty unless $evento is "Indici".

It looks like you want to select children of Indici, so:

<xsl:value-of select="$nodo/*[name()=$evento]"/>
^^

David