This xslt stylesheet:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>
 <xsl:strip-space elements="*"/>

  <xsl:param name="pNodeNames" select="'|size|mode|'"/>

  <xsl:template match="file/*">
    <xsl:if test="contains($pNodeNames, concat('|',name(),'|'))">
      <xsl:call-template name="identity"/>
    </xsl:if>
  </xsl:template>

  <xsl:template match="node()|@*" name="identity">
    <xsl:copy>
      <xsl:apply-templates select="node()|@*"/>
    </xsl:copy>
  </xsl:template>
</xsl:stylesheet>

when applied on your original xml source document:

<root>
 <file name = "AAA">
  <size>12</size>
  <modified>2</modified>
  <owner>Tom</owner>
  <mode>read</mode>
 </file>
 <file name = "BBB">
  <size>23</size>
  <modified>6</modified>
  <owner>Al</owner>
  <mode>write</mode>
 </file>
 <file name = "CCC">
  <size>15</size>
  <modified>6</modified>
  <owner>Jack</owner>
  <mode>read</mode>
 </file>
 <file name = "DDD">
  <size>12</size>
  <modified>4</modified>
  <owner>Jane</owner>
  <mode>write</mode>
 </file>
</root>

produces exactly the wanted result:

<root>
  <file name="AAA">
    <size>12</size>
    <mode>read</mode>
  </file>
  <file name="BBB">
    <size>23</size>
    <mode>write</mode>
  </file>
  <file name="CCC">
    <size>15</size>
    <mode>read</mode>
  </file>
  <file name="DDD">
    <size>12</size>
    <mode>write</mode>
  </file>
</root>

Hope this helped.

Cheers,
Dimitre Novatchev
"mark" <marekmb@g...> wrote in message 
news:1159694500.390830.56950@b......
> Hi,
> Does anyone could help me to prepare xsl file which copies xml document
> with list of nodes as parameters
> Source xml file:
> <root>
> <file name = "AAA">
> <size>12</size>
> <modified>2</modified>
> <owner>Tom</owner>
> <mode>read</mode>
> </file>
> <file name = "BBB">
> <size>23</size>
> <modified>6</modified>
> <owner>Al</owner>
> <mode>write</mode>
> </file>
> <file name = "CCC">
> <size>15</size>
> <modified>6</modified>
> <owner>Jack</owner>
> <mode>read</mode>
> </file>
> <file name = "DDD">
> <size>12</size>
> <modified>4</modified>
> <owner>Jane</owner>
> <mode>write</mode>
> </file>
> </root>
> And I would like to get nodes with eg. <size> and <mode> subnodes:
>
> <root>
> <file name = "AAA">
> <size>12</size>
> <mode>read</mode>
> </file>
> <file name = "BBB">
> <size>23</size>
> <mode>write</mode>
> </file>
> <file name = "CCC">
> <size>15</size>
> <mode>read</mode>
> </file>
> <file name = "DDD">
> <size>12</size>
> <mode>write</mode>
> </file>
> </root>
> Any example of xsl would be appreciated
>
> Mark
>