<?xml version="1.0" ?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/">
<xsl:variable name="unique-countries"
	select="/cities
		/city[not(@country=preceding-sibling::city/@country)]
		/@country"
/>
    <countries>
	<xsl:for-each select="$unique-countries">
	  <country name="{.}">
		<xsl:for-each select="//city[@country=current()]">
		  <city><xsl:value-of select="@name"/></city>
		</xsl:for-each>
	  </country> 
	</xsl:for-each>
    </countries>
</xsl:template>

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   * to you under the Apache License, Version 2.0 (the  "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
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   * distributed under the License is distributed on an "AS IS" BASIS,
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   * limitations under the License.
  -->

</xsl:stylesheet>
