取属性：
<FileInfo>
<FileName><xsl:value-of select="CFullClipInfo/FullLocationInfoList/FullLocationInfo/FileFolder/FilePath/@FileName"></xsl:value-of></FileName><FileVerifyCode />
</FileInfo>
取非空：
<ChannelID>
<xsl:choose>
<xsl:when test="normalize-space(Envelope/Body/OutStorageFunction/massageparam/channelId)!=''">
<xsl:value-of
select="Envelope/Body/OutStorageFunction/massageparam/channelId"></xsl:value-of>
</xsl:when>
<xsl:otherwise>CHN6</xsl:otherwise>
</xsl:choose>
</ChannelID>
