I wonder if it is possible to pass a parameter to a stylesheet and use this parameter as an attributename, like:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

  <xsl:output method="xml" encoding="utf-8" indent="yes" />
  <xsl:param name="environment" />

  <xsl:template match="/">
    <xsl:element name="rootelement">
      <xsl:apply-templates select="*[($environment = '1') or not ($environment)]" />
    </xsl:element>
  </xsl:template>

  <xsl:template match="*[($environment = '1') or not ($environment)]">
    ... some transformation
  </xsl:template>

</xsl:stylesheet>

In the XML-document every element has an attribute, that has the name of the parameter passed to the stylesheet. It's value can be 0 or 1. Eventually I want to end up with only those elements, whose attribute $environment has a value of 1.

Many thanks in advance,
Raoul.

How about

<xsl:apply-templates select="//*[@*[name()=$environment][.='1']]" />

Regards
Bryan

Thanks, your reply helped me a little, but my new stylesheet is not that sufficient, i guess.
Here's my XML:

<?xml version="1.0" ?>
<users env_a="1" env_b="1" env_c="1" env_d="1" env_e="1">
  <user env_a="1" env_b="1" env_c="1" env_d="1" env_e="1" id="id1" name="name1">
    <auth env_a="1" env_b="1" env_c="1" env_d="1" env_e="1">part1</auth>
    <auth env_a="1" env_b="1" env_c="1" env_d="1" env_e="1">part2</auth>
    <auth env_a="1" env_b="1" env_c="1" env_d="1" env_e="1">part3</auth>
  </user>
  <user env_a="1" env_b="1" env_c="1" env_d="1" env_e="0" id="id2" name="name2">
    <auth env_a="1" env_b="1" env_c="1" env_d="0" env_e="0">part1</auth>
    <auth env_a="1" env_b="1" env_c="1" env_d="0" env_e="0">part2</auth>
    <auth env_a="1" env_b="1" env_c="1" env_d="0" env_e="0">part3</auth>
  </user>
</users>

And my stylesheet is the following:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

  <xsl:output method="xml" encoding="utf-8" indent="yes" />
  <xsl:param name="environment" />

  <xsl:template match="/">
    <xsl:element name="users">
      <xsl:apply-templates select="*[@*[name()=$environment][.='1']]" />
    </xsl:element>
  </xsl:template>

  <xsl:template match="*">
    <xsl:if test="@*[name()=$environment][.='1']">
      <xsl:choose>
        <xsl:when test="name() = 'auth'">
          <xsl:element name="{name()}">
            <xsl:value-of select="." />
          </xsl:element>
        </xsl:when>
        <xsl:when test="name() = 'user'">
          <xsl:element name="{name()}" use-attribute-sets="User">
            <xsl:apply-templates select="auth[@*[name()=$environment][.='1']]" />
          </xsl:element>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates />
        </xsl:otherwise>
      </xsl:choose>
    </xsl:if>
  </xsl:template>

  <xsl:attribute-set name="User">
    <xsl:attribute name="id"><xsl:value-of select="@id" /></xsl:attribute>
    <xsl:attribute name="name"><xsl:value-of select="@name" /></xsl:attribute>
  </xsl:attribute-set>

</xsl:stylesheet>

I don't think it is neccessary to check value of the attributename passed to the stylesheet. Is there a more sufficient way?

Regards, Raoul.