带计数的 xslt 变换

发布于 2024-10-18 09:49:59 字数 710 浏览 2 评论 0原文

我正在尝试将一些 xml 数据执行 xslt 转换为 html。此转换需要执行 3 个任务，它们是：

按日期对数据进行排序
仅输出具有特定 id 的数据
仅输出其中的 3 个项目

因此，例如我的数据片段如下所示：

<program id="brand_id_1">
    <date>2011-10-25</date>
    <some_info>This is some info</some_info>
</program>
<program id="brand_id_2">
    <date>2011-10-22</date>
    <some_info>This is some info</some_info>
</program>
<program id="brand_id_1">
    <date>2011-10-27</date>
    <some_info>This is some info</some_info>
</program>

我可以按日期订购，我可以确保我只输出id为brand_id_1的那些，但是一旦我这样做了3次，如何停止输出呢？

任何帮助，非常感谢！海伦

原文

I'm trying to perform an xslt transform on some xml data into html. There are 3 tasks that this transform needs to do and these are:

Sort data by date
Output only those with a certain id
Output only 3 of those items

So for example a snippet of my data looks like this:

<program id="brand_id_1">
    <date>2011-10-25</date>
    <some_info>This is some info</some_info>
</program>
<program id="brand_id_2">
    <date>2011-10-22</date>
    <some_info>This is some info</some_info>
</program>
<program id="brand_id_1">
    <date>2011-10-27</date>
    <some_info>This is some info</some_info>
</program>

I can order by date, I can make sure I output only the ones with the id brand_id_1, but how do I stop outputting once I've done this 3 times?

Any help, much appreciated!
Helen

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前事休说 2024-10-25 09:49:59

排序然后检查位置，例如以下示例：

<xsl:for-each select="//program[@id = 'brand_id_1']">
  <xsl:sort select="date" data-type="text"/>
  <xsl:if test="position() < 4">
    <xsl:copy-of select="."/>
  </xsl:if>
</xsl:for-each>

Sort and then check the position as for instance in the following sample:

<xsl:for-each select="//program[@id = 'brand_id_1']">
  <xsl:sort select="date" data-type="text"/>
  <xsl:if test="position() < 4">
    <xsl:copy-of select="."/>
  </xsl:if>
</xsl:for-each>

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