我有这个xml文件:
<writer id_writer="1">
<name>name</name>
</writer>
<film id_writer="1">
</film>
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如何使用xslt打印每部电影的作者
<xsl:for-each select="film">
<xsl:value-of select="writer[@id_writer='what to put here']/name"></xsl:value-of>
</xsl:for-each>
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