html - 提取同一组内的第一组数据

Question

我有一个 XSLT 问题，这是我之前提出的问题的后续问题。

挑战在于从相同的重复集中提取数据集<root>。我有一个来自@Kirill Polishchuk 提供的上一个问题的示例XSLT 解决方案。

我只需要提取第一组数据，而忽略从 number="1" 开始的第二组数据

请注意我正在使用 XSLT 1.0。任何建议或指导将不胜感激。

输入：

<root>
  <page number="1" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="2" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="3" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="4" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="5" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="6" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="7" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="8" section="Arsenal_Crowds">Arsenal_Crowds</page> 
  <page number="9" section="Arsenal_Crowds">Arsenal_Crowds</page> 
  <page number="10" section="Arsenal_Crowds">Arsenal_Crowds</page> 
  <page number="11" section="Arsenal_Crowds">Arsenal_Crowds</page> 
  <page number="12" section="Arsenal_Crowds">Arsenal_Crowds</page> 
  <page number="13" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="14" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="15" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="16" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="17" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="18" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="19" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="20" section="Arsenal_Outlook">Arsenal_Outlook</page> 
  <page number="21" section="Arsenal_Outlook">Arsenal_Outlook</page> 
  <page number="22" section="Arsenal_Outlook">Arsenal_Outlook</page> 
  <page number="23" section="Arsenal_Outlook">Arsenal_Outlook</page> 
  <page number="24" section="Arsenal_Outlook">Arsenal_Outlook</page> 
  <page number="1" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="2" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="3" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="4" section="Arsenal_Stadium">Arsenal_Stadium</page> 
  <page number="5" section="Arsenal_Crowds">Arsenal_Crowds</page> 
  <page number="6" section="Arsenal_Crowds">Arsenal_Crowds</page> 
  <page number="7" section="Arsenal_Crowds">Arsenal_Crowds</page> 
  <page number="8" section="Arsenal_Crowds">Arsenal_Crowds</page>
  <page number="9" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="10" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="11" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="12" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="13" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="14" section="Arsenal_Finances">Arsenal_Finances</page> 
  <page number="15" section="Arsenal_Outlook">Arsenal_Outlook</page> 
  <page number="16" section="Arsenal_Outlook">Arsenal_Outlook</page> 
  <page number="17" section="Arsenal_Outlook">Arsenal_Outlook</page> 
  <page number="18" section="Arsenal_Outlook">Arsenal_Outlook</page>
 </root>

期望的输出：

<table>
<tr>
<td class="Stadium">Arsenal_Stadium</td>
<td></td>
<td class="Crowds">Arsenal_Crowds</td>
<td></td>
<td class="Finances">Arsenal_Finances</td>
<td></td>
<td class="Outlook">Arsenal_Outlook</td>
<td></td>
</tr>
<tr>
<td>1</td>
<td>7</td>
<td>8</td>
<td>12</td>
<td>13</td>
<td>19</td>
<td>20</td>
<td>24</td>
</tr>
</table>

score 1 · Accepted Answer

这种转变：

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" omit-xml-declaration="yes" indent="yes"/>

  <xsl:key name="k" use="@section" match=
  "page[(@number > 1 and count(preceding-sibling::*[@number=1]) = 1)
      or
        (@number=1 and count(preceding-sibling::*[@number=1]) =0)
       ]"/>

  <xsl:template match="/*">
    <table>
      <tr>
        <xsl:apply-templates select=
          "page[generate-id() = generate-id(key('k', @section))]"/>
      </tr>
      <tr>
        <xsl:apply-templates mode="page"
          select="page[generate-id() = generate-id(key('k', @section))]" />
      </tr>
    </table>
  </xsl:template>

  <xsl:template match="page">
    <td class="{substring-after(@section, '_')}"><xsl:value-of select="."/></td>
    <td></td>
  </xsl:template>

  <xsl:template match="page" mode="page">
    <td><xsl:value-of select="@number"/></td>
    <td><xsl:value-of select="key('k', @section)[last()]/@number"/></td>
  </xsl:template>
</xsl:stylesheet>

应用于提供的 XML 文档时：

<root>
    <page number="1" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="2" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="3" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="4" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="5" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="6" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="7" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="8" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="9" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="10" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="11" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="12" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="13" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="14" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="15" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="16" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="17" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="18" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="19" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="20" section="Arsenal_Outlook">Arsenal_Outlook</page>
    <page number="21" section="Arsenal_Outlook">Arsenal_Outlook</page>
    <page number="22" section="Arsenal_Outlook">Arsenal_Outlook</page>
    <page number="23" section="Arsenal_Outlook">Arsenal_Outlook</page>
    <page number="24" section="Arsenal_Outlook">Arsenal_Outlook</page>
    <page number="1" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="2" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="3" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="4" section="Arsenal_Stadium">Arsenal_Stadium</page>
    <page number="5" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="6" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="7" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="8" section="Arsenal_Crowds">Arsenal_Crowds</page>
    <page number="9" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="10" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="11" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="12" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="13" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="14" section="Arsenal_Finances">Arsenal_Finances</page>
    <page number="15" section="Arsenal_Outlook">Arsenal_Outlook</page>
    <page number="16" section="Arsenal_Outlook">Arsenal_Outlook</page>
    <page number="17" section="Arsenal_Outlook">Arsenal_Outlook</page>
    <page number="18" section="Arsenal_Outlook">Arsenal_Outlook</page>
</root>

产生想要的正确结果：

<table>
   <tr>
      <td class="Stadium">Arsenal_Stadium</td>
      <td/>
      <td class="Crowds">Arsenal_Crowds</td>
      <td/>
      <td class="Finances">Arsenal_Finances</td>
      <td/>
      <td class="Outlook">Arsenal_Outlook</td>
      <td/>
   </tr>
   <tr>
      <td>1</td>
      <td>7</td>
      <td>8</td>
      <td>12</td>
      <td>13</td>
      <td>19</td>
      <td>20</td>
      <td>24</td>
   </tr>
</table>

概括：

为了处理第 K 个“集合，很容易推广这种转换。

例如，以下转换处理相同的第二个“集合”，提供的 XML 文档（上图）：

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" omit-xml-declaration="yes" indent="yes"/>

  <xsl:key name="k" use="@section" match=
  "page[(@number > 1 and count(preceding-sibling::*[@number=1]) = 2)
      or
        (@number=1 and count(preceding-sibling::*[@number=1]) =1)
       ]"/>

  <xsl:template match="/*">
    <table>
      <tr>
        <xsl:apply-templates select=
          "page[generate-id() = generate-id(key('k', @section))]"/>
      </tr>
      <tr>
        <xsl:apply-templates mode="page"
          select="page[generate-id() = generate-id(key('k', @section))]" />
      </tr>
    </table>
  </xsl:template>

  <xsl:template match="page">
    <td class="{substring-after(@section, '_')}"><xsl:value-of select="."/></td>
    <td></td>
  </xsl:template>

  <xsl:template match="page" mode="page">
    <td><xsl:value-of select="@number"/></td>
    <td><xsl:value-of select="key('k', @section)[last()]/@number"/></td>
  </xsl:template>
</xsl:stylesheet>

在这种情况下，再次产生所需的正确结果：

<table>
   <tr>
      <td class="Stadium">Arsenal_Stadium</td>
      <td/>
      <td class="Crowds">Arsenal_Crowds</td>
      <td/>
      <td class="Finances">Arsenal_Finances</td>
      <td/>
      <td class="Outlook">Arsenal_Outlook</td>
      <td/>
   </tr>
   <tr>
      <td>1</td>
      <td>4</td>
      <td>5</td>
      <td>8</td>
      <td>9</td>
      <td>14</td>
      <td>15</td>
      <td>18</td>
   </tr>
</table>

html - 提取同一组内的第一组数据

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