Assuming XSLT 2.0
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="2.0">
<xsl:output indent="yes"/>
<xsl:template match="/">
<xsl:apply-templates select="*/FileInfo"/>
</xsl:template>
<xsl:template match="*/FileInfo">
<xsl:result-document href="Output{position()}.xml">
<xsl:apply-templates select="/*" mode="split">
<xsl:with-param name="target" tunnel="yes" select="current()"/>
</xsl:apply-templates>
</xsl:result-document>
</xsl:template>
<xsl:template match="@* | node()" mode="#all">
<xsl:copy>
<xsl:apply-templates select="@* , node()" mode="#current"/>
</xsl:copy>
</xsl:template>
<xsl:template match="*/FileInfo" mode="split">
<xsl:param name="target" tunnel="yes"/>
<xsl:if test="$target is .">
<xsl:next-match/>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
If you need a solution with Xalan Java in XSLT 1.0 but making use of a Xalan specific extension element then here is an example:
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:redirect="http://xml.apache.org/xalan/redirect"
extension-element-prefixes="redirect"
exclude-result-prefixes="redirect"
version="1.0">
<xsl:output indent="yes"/>
<xsl:template match="/">
<xsl:apply-templates select="*/FileInfo" mode="split"/>
</xsl:template>
<xsl:template match="*/FileInfo" mode="split">
<redirect:write file="OutputXalanTest{position()}.xml">
<xsl:apply-templates select="/*">
<xsl:with-param name="target" select="current()"/>
</xsl:apply-templates>
</redirect:write>
</xsl:template>
<xsl:template match="@* | node()" name="identity">
<xsl:param name="target"/>
<xsl:copy>
<xsl:apply-templates select="@* | node()">
<xsl:with-param name="target" select="$target"/>
</xsl:apply-templates>
</xsl:copy>
</xsl:template>
<xsl:template match="*/FileInfo">
<xsl:param name="target"/>
<xsl:if test="generate-id($target) = generate-id(.)">
<xsl:call-template name="identity"/>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
I have only tested that with the Xalan version available from Apache but hopefully it works as well with the Xalan version Sun/Oracle incorporated in the Java JRE.
