XSLT 分组和子分组

Question

我有以下代码：

    <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="html" />

  <xsl:key name="categories" match="Category" use="." />
  <xsl:key name="clients" match="Category" use ="Category/Client" />

  <xsl:template match="/">
    <ul id="red" class="treeview-red">
      <xsl:for-each select="/Promotions/Promotion/Category[  
        generate-id(.) = generate-id(key('categories', .)[1])  
      ]">
        <xsl:variable name="cname" select="." />

        <li>
          <span>
            <xsl:value-of select="$cname" />
          </span>

          <xsl:for-each select="/Promotions/Promotion[Category=$cname]">
            <ul>
              <li>
                <span>
                  <xsl:value-of select="Client" />
                </span>
              </li>
              <ul>
                <li>
                  <span>
                    <xsl:value-of select="Title" />
                  </span>
                </li>
              </ul>
            </ul>
          </xsl:for-each>
        </li>
      </xsl:for-each>

    </ul>
  </xsl:template>
</xsl:stylesheet>

我的 XML：

<Promotions>
  <Promotion>
    <Category>Arts &amp; Entertainment</Category>
    <Client>Client 1</Client>
    <Title>Get your Free 2</Title>
  </Promotion>
  <Promotion>
    <Category>Arts &amp; Entertainment</Category>
    <Client>Client 1</Client>
    <Title>Get your Free 4</Title>
  </Promotion>
  <Promotion>
    <Category>Arts &amp; Entertainment</Category>
    <Client>Client 1</Client>
    <Title>Get your Free 5</Title>
  </Promotion>
  <Promotion>
    <Category>Community &amp; Neighborhood</Category>
    <Client>Client 2</Client>
    <Title>Get your Free 1</Title>
  </Promotion>
  <Promotion>
    <Category>Education</Category>
    <Client>Client 3</Client>
    <Title>Get Your Free 3</Title>
  </Promotion>
</Promotions>

它输出以下内容：

<ul id="red" class="treeview-red">
  <li><span>Arts &amp; Entertainment</span><ul>
      <li><span>Client 1</span></li>
      <ul>
        <li><span>Get your Free 2</span></li>
      </ul>
    </ul>
    <ul>
      <li><span>Client 1</span></li>
      <ul>
        <li><span>Get your Free 4</span></li>
      </ul>
    </ul>
    <ul>
      <li><span>Client 1</span></li>
      <ul>
        <li><span>Get your Free 5</span></li>
      </ul>
    </ul>
  </li>
  <li><span>Community &amp; Neighborhood</span><ul>
      <li><span>Client 2</span></li>
      <ul>
        <li><span>Get your Free 1</span></li>
      </ul>
    </ul>
  </li>
  <li><span>Education</span><ul>
      <li><span>Client 3</span></li>
      <ul>
        <li><span>Get Your Free 3</span></li>
      </ul>
    </ul>
  </li>
</ul>

我希望输出首先按类别分组，然后按每个类别的客户端进行分组，对此的任何见解都会很棒：

<ul id="red" class="treeview-red">
  <li><span>Arts &amp; Entertainment</span><ul>
      <li><span>Client 1</span></li>
      <ul>
        <li><span>Get your Free 2</span></li>
      </ul>
      <ul>
        <li><span>Get your Free 4</span></li>
      </ul>
      <ul>
        <li><span>Get your Free 5</span></li>
      </ul>
    </ul>
  </li>
  <li><span>Community &amp; Neighborhood</span><ul>
      <li><span>Client 2</span></li>
      <ul>
        <li><span>Get your Free 1</span></li>
      </ul>
    </ul>
  </li>
  <li><span>Education</span><ul>
      <li><span>client 3</span></li>
      <ul>
        <li><span>Get Your Free 3</span></li>
      </ul>
    </ul>
  </li>
</ul>

基本上在按类别分组之后，我只想查看该类别下的一位客户以及该类别中该客户的每次促销活动。

Answer 1

如果没有看到 XML 输入，就很难建议对样式表进行更改，因此目前我所能做的就是查看 http://www.biglist.com/lists/xsl-list/archives/200101/msg00070.html 作为使用 XSLT 1.0 进行多级分组的示例。

[编辑]：以下是应用两级慕尼黑分组的方法：

<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="1.0">

  <xsl:output method="html" indent="yes"/>

  <xsl:key name="k1" match="Promotion" use="Category"/>
  <xsl:key name="k2" match="Promotion" use="concat(Category, '|', Client)"/>

  <xsl:template match="Promotions">
    <ul id="red" class="treeview-red">
      <xsl:for-each select="Promotion[generate-id() = generate-id(key('k1', Category)[1])]">
        <li>
          <span>
            <xsl:value-of select="Category"/>
          </span>
          <xsl:for-each select="key('k1', Category)[generate-id() = generate-id(key('k2', concat(Category, '|', Client))[1])]">
            <ul>
              <li>
                <span>
                  <xsl:value-of select="Client"/>
                </span>
                <xsl:for-each select="key('k2', concat(Category, '|', Client))">
                  <ul>
                    <li>
                      <span>
                        <xsl:value-of select="Title"/>
                      </span>
                    </li>
                  </ul>
                </xsl:for-each>
              </li>
            </ul>
          </xsl:for-each>
        </li>
      </xsl:for-each>
    </ul>
  </xsl:template>

</xsl:stylesheet>