用xslt和子节点分组 [英] Grouping with xslt and child nodes

问题描述

我在这里尝试了一些示例，但是仍然无法获得正确的输出.之前，我对XSLT的工作并不多.我想对详细信息"元素进行分组，并将与该组匹配的所有数据"元素作为子元素添加到详细信息"元素.

I have tried some of the examples here, but I still can't get the correct output. I haven't worked much with XSLT before. I want to group on the "Detail" element and get all the "Data" elements matching that group as children to the "Detail" element.

示例:

输入

<?xml version="1.0" encoding="utf-8"?>
<File>
  <Detail type="A" group="1" >
    <Data>
      <Nr>1</Nr>
    </Data>
    <Data>
      <Nr>2</Nr>
    </Data>
  </Detail>
  <Detail type="B" group="1">
    <Data>
      <Nr>3</Nr>
    </Data>
    <Data>
      <Nr>4</Nr>
    </Data>
  </Detail>
  <Detail type="B" group="2">
    <Data>
      <Nr>5</Nr>
    </Data>
  </Detail>
  <Detail type="A" group="1">
    <Data>
      <Nr>6</Nr>
    </Data>
  </Detail>
</File>

想要的输出("Detail type =" A"group =" 1>元素组合在一起，并且所有与该组匹配的元素都作为子元素

Wanted output ("Detail type="A" group="1"> elements grouped together and all the elements matching that group as children)

<?xml version="1.0" encoding="utf-8"?>
<File>
  <Detail type="A" group="1" >
    <Data>
      <Nr>1</Nr>
    </Data>
    <Data>
      <Nr>2</Nr>
    </Data>
    <Data>
      <Nr>6</Nr>
    </Data>
  </Detail>
  <Detail type="B" group="1">
    <Data>
      <Nr>3</Nr>
    </Data>
    <Data>
      <Nr>4</Nr>
    </Data>
  </Detail>
  <Detail type="B" group="2">
    <Data>
      <Nr>5</Nr>
    </Data>
  </Detail>
</File>

感谢您的帮助:)

推荐答案

注意:在我拿起书包之前，这个问题在垃圾箱中搁置了6个小时.我的答案在垃圾箱中停滞了两个小时，然后其他人掩盖了一些不必要的评论作为答案.

NOTE: This question languished in the bin for 6 hours before I took it up. My answer languished in the bin for two hours before someone else disguised some non-essential comments as an answer.

研究Muenchian分组.对于这些分组问题很方便.

Study up on Muenchian grouping. It's handy for these grouping problems.

重型起重器是< xsl:key> ，它基于@type和@group的连接创建密钥，此处的行是< xsl:for-每个select ="File/Detail [count(.| key('details'，concat(@type，'_'，@ group))[1])= 1]"> ，将第一个隔离细节节点出现时具有特定的键，并通过扩展将@group和@type进行特定的配对.

The heavy lifters are <xsl:key>, which creates a key based on a concat of @type and @group, and this line here, <xsl:for-each select="File/Detail[count(. | key('details', concat(@type,'_',@group))[1]) = 1]">, which isolates the first occurrence of the Detail node having a particular key and by extension a particular pairing of @group and @type.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
     <xsl:key name="details" match="Detail" 
             use="concat(@type,'_',@group)"/>
    <xsl:template match='/'>
      <File>
        <xsl:for-each select="File/Detail[count(. | key('details', concat(@type,'_',@group))[1]) = 1]">
          <xsl:sort select="concat(@type,'_',@group)" />
          <Detail type="{@type}" group="{@group}">
            <xsl:for-each select="key('details', concat(@type,'_',@group))">
              <xsl:copy-of select="Data"/>  
           </xsl:for-each>
          </Detail>
       </xsl:for-each>
     </File>
   </xsl:template>   
</xsl:stylesheet>

这篇关于用xslt和子节点分组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！