<xsl:stylesheet xmlns:xsl="http://www.w3.org/（ｒｙ xmlns:aws="http://abc.com/"
exclude-result-prefixes="human">

<xsl:for-each select="people/person/age">
　ここで別のXMLを取ってくる
　<xsl:apply-templates select="human:hobbies/human:hoby" />
</xsl:for-each>

<xsl:template match="human:hobby">