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>

我希望输出先按类别分组，然后再按每个类别的客户分组，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后，我只想看到该类别下的一个客户以及该类别中该客户的每个促销事件。

Answer 1

如果没有看到 XML 输入，很难建议对样式表进行更改，所以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]:这是应用两级 Muenchian 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>