<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">

   <xsl:param select="'development'" name="VERSION"/>

   <xsl:output method="text"/>

   <xsl:template match="/versions">
      <xsl:value-of select=" normalize-space(*[local-name() = $VERSION])"/>
   </xsl:template>

</xsl:stylesheet>