如何在xslt中进行聚合1.0

Question

嗨，我想在XSLT中进行一些聚合。例如，我有以下xml文件。

<?xml version="1.0" encoding="UTF-8" standalone="no" ?> 
<reporting:root xmlns:reporting="testing"> 
    <reporting:default0 reporting:type="Portfolio"> 
    <reporting:window reporting:Id="1" reporting:level="0" reporting:name="TEST" reporting:parentId="-1"> 
     <reporting:folio reporting:Id="2" reporting:criteria="0" reporting:level="1" reporting:name="topfolder1" reporting:parentId="1"> 
     <reporting:folio reporting:Id="37" reporting:criteria="0" reporting:level="2" reporting:name="folder2" reporting:parentId="2"> 
      <reporting:folio reporting:Id="38" reporting:criteria="0" reporting:level="3" reporting:name="folder3" reporting:parentId="37"> 
      <reporting:folio reporting:Id="196" reporting:criteria="0" reporting:level="4" reporting:name="folder4" reporting:parentId="38"> 
       <reporting:line reporting:Id="123456" reporting:level="5" reporting:name="element1" reporting:parentId="196" reporting:positionType="0"> 
       <reporting:reference>element1</reporting:reference> 
       <reporting:number>625</reporting:number> 
       </reporting:line> 
       <reporting:line reporting:Id="223456" reporting:level="5" reporting:name="element2" reporting:parentId="196" reporting:positionType="7"> 
       <reporting:reference>element2</reporting:reference> 
       <reporting:number>475</reporting:number> 
       </reporting:line> 
       <reporting:folio reporting:Id="209" reporting:criteria="0" reporting:level="5" reporting:name="delta" reporting:parentId="196"> 
       <reporting:line reporting:Id="223456" reporting:level="6" reporting:name="element2" reporting:parentId="209" reporting:positionType="0"> 
        <reporting:reference>element2</reporting:reference> 
        <reporting:number>190</reporting:number> 
       </reporting:line> 
       </reporting:folio> 
      </reporting:folio> 
      </reporting:folio> 
     </reporting:folio> 
     </reporting:folio> 
     <reporting:folio reporting:Id="4" reporting:criteria="0" reporting:level="1" reporting:name="topfolder2" reporting:parentId="1"> 
     <reporting:folio reporting:Id="39" reporting:criteria="0" reporting:level="2" reporting:name="folder24" reporting:parentId="4"> 
      <reporting:folio reporting:Id="40" reporting:criteria="0" reporting:level="3" reporting:name="folder34" reporting:parentId="39"> 
      <reporting:folio reporting:Id="296" reporting:criteria="0" reporting:level="4" reporting:name="folder44" reporting:parentId="40"> 
       <reporting:line reporting:Id="123456" reporting:level="5" reporting:name="element3" reporting:parentId="296" reporting:positionType="0"> 
       <reporting:reference>element3</reporting:reference> 
       <reporting:number>65525</reporting:number> 
       </reporting:line> 
       <reporting:folio reporting:Id="309" reporting:criteria="0" reporting:level="5" reporting:name="delta" reporting:parentId="296"> 
       <reporting:line reporting:Id="2234567" reporting:level="6" reporting:name="element4" reporting:parentId="309" reporting:positionType="0"> 
        <reporting:reference>element4</reporting:reference> 
        <reporting:number>490</reporting:number> 
       </reporting:line> 
       </reporting:folio> 
      </reporting:folio> 
      </reporting:folio> 
     </reporting:folio> 
     </reporting:folio> 
    </reporting:window> 
    </reporting:default0> 
</reporting:root> 

然后我想在'2级'做一些聚合。即“报告：行”内的任何内容都应返回，并且它是1级和2级父级报告：“folio”也应返回。同样对于level2文件夹的anysubfolder下的相同元素应该聚合为一个。并且还计算总和（数字）。

也没有。在有报告：行标记之前，子作品集可以是200。

所以这个XML我想要得到的结果是：

topfolder,folder2,element1,625 
topfolder,folder2,element2,665 
topfolder2,folder24,element3,65525 
topfolder2,folder24,element4,490 

希望我正确解释它。非常感谢您的帮助。

Answer 1

在这种情况下，您需要首先进行分组，然后进行聚合。您需要按照作品集级别1，作品集级别2和元素名称对元素进行分组。要做到这一点，你通常使用Muenchian分组的方法。

首先，定义一个的xsl：键其可用于将所有匹配元素一起

<xsl:key name="lines" match="reporting:line" use=" 
concat(
concat(
    concat(ancestor::reporting:folio[@reporting:level='1']/@reporting:name, ','), 
    concat(ancestor::reporting:folio[@reporting:level='2']/@reporting:name, ',') 
), 
@reporting:name 
)" /> 

接下来，就需要选择各组中的第一匹配部件。

<xsl:apply-templates select="//reporting:line 
    [generate-id() = 
    generate-id(key('lines', ...concatenated key... )[1])]" /> 

然后，它是当应用到总结匹配查找键

<xsl:value-of select="sum(key('lines', $keyName)/reporting:number)" /> 

把这个完全给

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:reporting="testing"> 
    <xsl:output method="text" indent="yes"/> 

    <xsl:key name="lines" match="reporting:line" use="concat(concat(concat(ancestor::reporting:folio[@reporting:level='1']/@reporting:name, ','), concat(ancestor::reporting:folio[@reporting:level='2']/@reporting:name, ',')), @reporting:name)" /> 

    <xsl:template match="/"> 
     <xsl:apply-templates select="//reporting:line[generate-id() = generate-id(key('lines', concat(concat(concat(ancestor::reporting:folio[@reporting:level='1']/@reporting:name, ','), concat(ancestor::reporting:folio[@reporting:level='2']/@reporting:name, ',')), @reporting:name))[1])]" /> 
    </xsl:template> 

    <xsl:template match="reporting:line"> 
     <xsl:variable name="keyName" select="concat(concat(concat(ancestor::reporting:folio[@reporting:level='1']/@reporting:name, ','), concat(ancestor::reporting:folio[@reporting:level='2']/@reporting:name, ',')), @reporting:name)" /> 
     <xsl:value-of select="$keyName" /> 
     <xsl:text>,</xsl:text> 
     <xsl:value-of select="sum(key('lines', $keyName)/reporting:number)" /> 
     <xsl:text>&#13;</xsl:text> 
    </xsl:template> 
</xsl:stylesheet> 

所有元素的“简单”的情况下，你示例XML，输出如下：

topfolder1,folder2,element1,625 
topfolder1,folder2,element2,665 
topfolder2,folder24,element3,65525 
topfolder2,folder24,element4,490