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XSL 合並同一文件中的多個 XML 記錄

[英]XSL Merging Multiple XML Records in the Same File

 原文  2020-01-28 21:21:31  9   3    xml/ xslt/ merge

問題描述

我有一個包含多個記錄一個XML文件。 每條記錄都有一個鍵。 我想通過鍵選擇所有記錄並將每個記錄折疊成一個 XML 記錄。 每個 XML 記錄中的一些數據是重復的，並且存在空元素。 我還想刪除重復項和空標簽。

輸入

<Data>
    <Record>
        <Key>12345</Key>
        <Number>09095I</Number>
        <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
        <Text_Field_2>This is Text Field 2</Text_Field_2>
        <Author>A1</Author>
        <Author>A2</Author>
        <Author></Author>
        <Author>A1</Author>
        <Author>A2</Author>
        <Author>A3</Author>
        <Author></Author>
        <Author>A1</Author>
        <Date>10/12/2019</Date>
        <Summary>Record 1: Summary 1 Text</Summary>
    </Record>
    <Record>
        <Key>12345</Key>
        <Number>09095I</Number>
        <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
        <Text_Field_2>This is Text_Field_2</Text_Field_2>
        <Author>A2</Author>
        <Author></Author>
        <Author>A1</Author>
        <Author>A3</Author>
        <Author></Author>
        <Author>B2</Author>
        <Author></Author>
        <Author>B2</Author>
        <Date>10/12/2019</Date>
        <Summary>Record 2: Summary 1 Text</Summary>
    </Record>
    <Record>
        <Key>23456</Key>
        <Number>43095I</Number>
        <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
        <Text_Field_2>This is Text_Field_2</Text_Field_2>
        <Author>AA2</Author>
        <Author></Author>
        <Author>AA1</Author>
        <Author>AA3</Author>
        <Author></Author>
        <Author>AA3</Author>
        <Author>BB2</Author>
        <Author></Author>
        <Author>AA3</Author>
        <Date>01/12/2020</Date>
        <Summary>Record 1: Summary 1 Text</Summary>
    </Record>
    <Record>
        <Key>23456</Key>
        <Number>43095I</Number>
        <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
        <Text_Field_2>This is Text_Field_2</Text_Field_2>
        <Author>AA1</Author>
        <Author>AA3</Author>
        <Author></Author>
        <Author>CC2</Author>
        <Author></Author>
        <Author>AA1</Author>
        <Author>CC2</Author>
        <Date>01/12/2020</Date>
        <Summary>Record 2: Summary 1 Text</Summary>
    </Record>
    <Record>
        <Key>23456</Key>
        <Number>43095I</Number>
        <Text_Field_1>Record 3: This is Text Field 1</Text_Field_1>
        <Text_Field_2>This is Text_Field_2</Text_Field_2>
        <Author>AA1</Author>
        <Author>AA3</Author>
        <Author></Author>
        <Author>CC2</Author>
        <Author></Author>
        <Author>AA1</Author>
        <Author>CC3</Author>
        <Date>01/12/2020</Date>
        <Summary>Record 3: Summary 1 Text</Summary>
    </Record>
    <Record>
        <Key>778899</Key>
        <Number>998822I</Number>
        <Text_Field_1>Record 1: This is Text_Field_1</Text_Field_1>
        <Text_Field_2>This is Text_Field_2</Text_Field_2>
        <Author>A2</Author>
        <Author></Author>
        <Author>D1</Author>
        <Author>D2</Author>
        <Author></Author>
        <Author>D3</Author>
        <Author>D33</Author>
        <Author></Author>
        <Author>D33</Author>
        <Date>10/12/2019</Date>
        <Summary>Record 1: Summary 1 Text</Summary>
    </Record>
</Data>

期望輸出

<Data>
    <Record>
        <Key>12345</Key>
        <Number>09095I</Number>
        <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
        <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
        <Text_Field_2>This is Text Field 2</Text_Field_2>
        <Author>A1</Author>
        <Author>A2</Author>
        <Author>A3</Author>
        <Author>B2</Author>
        <Date>10/12/2019</Date>
        <Summary>Record 1: Summary 1 Text</Summary>
        <Summary>Record 2: Summary 1 Text</Summary>
    </Record>

    <Record>
        <Key>23456</Key>
        <Number>43095I</Number>
        <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
        <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
        <Text_Field_1>Record 3: This is Text Field 1</Text_Field_1>
        <Text_Field_2>This is Text_Field_2</Text_Field_2>
        <Author>AA1</Author>
        <Author>AA2</Author>
        <Author>AA3</Author>
        <Author>BB2</Author>
        <Author>CC2</Author>
        <Author>CC3</Author>
        <Date>01/12/2020</Date>
        <Summary>Record 1: Summary 1 Text</Summary>
        <Summary>Record 2: Summary 1 Text</Summary>
        <Summary>Record 3: Summary 1 Text</Summary>
    </Record>
    <Record>
        <Key>778899</Key>
        <Number>998822I</Number>
        <Text_Field_1>Record 1: This is Text_Field_1</Text_Field_1>
        <Text_Field_2>This is Text_Field_2</Text_Field_2>
        <Author>A2</Author>
        <Author>D1</Author>
        <Author>D2</Author>
        <Author>D3</Author>
        <Author>D33</Author>
        <Date>10/12/2019</Date>
        <Summary>Record 1: Summary 1 Text</Summary>
    </Record>
</Data>

我已經使用過這段代碼，但我不確定這是正確的路徑。

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:fn="http://www.w3.org/2005/xpath-functions">
    <xsl:output method="xml" indent="yes"/>
    <xsl:strip-space elements="*" />

    <xsl:key name="key" match="Record" use="Key"/>
    <xsl:key name="kNamedSiblings" match="*" 
           use="concat(generate-id(..), '+', name())"/>

    <xsl:template match="*">
      <xsl:copy>
        <xsl:apply-templates select="key('kNamedSiblings', 
                                         concat(generate-id(..), '+', name())
                                        )/node()" />
        </xsl:copy>
    </xsl:template>
    <xsl:template match="*[not(*) and . = '']" />
    <xsl:template match="*[generate-id() != 
                         generate-id(key('kNamedSiblings', 
                                         concat(generate-id(..), '+', name()))[1]
                                    )]" />
</xsl:stylesheet>

電流輸出

<?xml version="1.0"?>
<Data>
  <Record>

    <Key>12345</Key>
    <Number>09095I</Number>
    <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
    <Text_Field_2>This is Text Field 2</Text_Field_2>
    <Author>A1A2A1A2A3A1</Author>
    <Date>10/12/2019</Date>
    <Summary>Record 1: Summary 1 Text</Summary>

    <Key>12345</Key>
    <Number>09095I</Number>
    <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
    <Text_Field_2>This is Text_Field_2</Text_Field_2>
    <Author>A2A1A3B2B2</Author>
    <Date>10/12/2019</Date>
    <Summary>Record 2: Summary 1 Text</Summary>

    <Key>23456</Key>
    <Number>43095I</Number>
    <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
    <Text_Field_2>This is Text_Field_2</Text_Field_2>
    <Author>AA2AA1AA3AA3BB2AA3</Author>
    <Date>01/12/2020</Date>
    <Field_Text_1>This is the Text 1</Field_Text_1>

    <Key>23456</Key>
    <Number>43095I</Number>
    <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
    <Text_Field_2>This is Text_Field_2</Text_Field_2>
    <Author>AA1AA3CC2AA1CC2</Author>
    <Date>01/12/2020</Date>
    <Field_Text_1>This is the Text 1</Field_Text_1>

    <Key>23456</Key>
    <Number>43095I</Number>
    <Text_Field_1>Record 3: This is Text Field 1</Text_Field_1>
    <Text_Field_2>This is Text_Field_2</Text_Field_2>
    <Author>AA1AA3CC2AA1CC3</Author>
    <Date>01/12/2020</Date>
    <Field_Text_1>This is the Text 1</Field_Text_1>

    <Key>778899</Key>
    <Number>998822I</Number>
    <Text_Field_1>Record 1: This is Text_Field_1</Text_Field_1>
    <Text_Field_2>This is Text_Field_2</Text_Field_2>
    <Author>A2A3A3A3</Author>
    <Date>10/12/2019</Date>
    <Field_Text_1>This is the Text 1</Field_Text_1>
  </Record>
</Data>

我當前的代碼創建了一個大記錄，而不是三個單獨的記錄。 此外，不維護 Author 元素。 相反，創建一個元素並將這些值集中在一起。 我知道這是一個分階段的解決方案，涉及： - 將多個記錄合並為一個鍵 - 刪除空標簽 - 刪除具有相同值的重復標簽 - 維護原始 XML 結構

了解解決方案也會有很大幫助。

3 個解決方案

解決方案1
 2 已采納  2020-01-28 21:56:34

因為您的樣式表表明您可以使用 XSLT-2.0，所以您可以將您的方法從使用復雜的xsl:key one 簡化為更直接的xsl:for-each-group one：

<xsl:template match="Data">
  <xsl:copy>
    <xsl:for-each-group select="Record" group-by="Key">
      <xsl:copy>
        <xsl:for-each-group select="current-group()/*[normalize-space()]" group-by="concat(name(),.)">
          <xsl:sort select="name()" order="ascending" />
          <xsl:copy-of select="current-group()[1]" />
        </xsl:for-each-group>
      </xsl:copy>
    </xsl:for-each-group>
  </xsl:copy>
</xsl:template>

這個模板組的Record由元素Key由包括該元素的名稱和內容的字符串，然后組它的結果。 其結果按字母順序排序以將具有相同名稱的元素分組。
然后，輸出第一個（也是唯一的）元素。

輸出是：

<?xml version="1.0" encoding="UTF-8"?>
<Data>
   <Record>
      <Author>A1</Author>
      <Author>A2</Author>
      <Author>A3</Author>
      <Author>B2</Author>
      <Date>10/12/2019</Date>
      <Key>12345</Key>
      <Number>09095I</Number>
      <Summary>Record 1: Summary 1 Text</Summary>
      <Summary>Record 2: Summary 1 Text</Summary>
      <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
      <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
      <Text_Field_2>This is Text Field 2</Text_Field_2>
      <Text_Field_2>This is Text_Field_2</Text_Field_2>
   </Record>
   <Record>
      <Author>AA2</Author>
      <Author>AA1</Author>
      <Author>AA3</Author>
      <Author>BB2</Author>
      <Author>CC2</Author>
      <Author>CC3</Author>
      <Date>01/12/2020</Date>
      <Key>23456</Key>
      <Number>43095I</Number>
      <Summary>Record 1: Summary 1 Text</Summary>
      <Summary>Record 2: Summary 1 Text</Summary>
      <Summary>Record 3: Summary 1 Text</Summary>
      <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
      <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
      <Text_Field_1>Record 3: This is Text Field 1</Text_Field_1>
      <Text_Field_2>This is Text_Field_2</Text_Field_2>
   </Record>
   <Record>
      <Author>A2</Author>
      <Author>D1</Author>
      <Author>D2</Author>
      <Author>D3</Author>
      <Author>D33</Author>
      <Date>10/12/2019</Date>
      <Key>778899</Key>
      <Number>998822I</Number>
      <Summary>Record 1: Summary 1 Text</Summary>
      <Text_Field_1>Record 1: This is Text_Field_1</Text_Field_1>
      <Text_Field_2>This is Text_Field_2</Text_Field_2>
   </Record>
</Data>

解決方案2
 1  2020-01-28 22:16:25

除了zx485 很好的 XSLT 2.0 答案之外，這里還有一個帶有雙鍵分組的 XSLT 1.0 樣式表：

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="xml" indent="yes"/>
    <xsl:strip-space elements="*" />
    <xsl:key name="Record-by-Key" match="Record" use="Key"/>
    <xsl:key name="Record-by-Key-child-by-name-value" match="Record/*" 
             use="concat(../Key,'+',name(),'+',.)"/>
    <xsl:template match="Data">
      <Data>
        <xsl:for-each 
             select="*[generate-id()=generate-id(key('Record-by-Key',Key)[1])]">
            <Record>
                <xsl:for-each  
                    select="key('Record-by-Key',Key)
                            /*[generate-id()
                                =generate-id(
                                    key('Record-by-Key-child-by-name-value',
                                        concat(../Key,'+',name(),'+',.))[1])]">
                    <xsl:sort select="name()"/>
                    <xsl:copy-of select="self::*[node()]"/>                
                </xsl:for-each>
            </Record>
        </xsl:for-each>  
      </Data>
    </xsl:template>
</xsl:stylesheet>

輸出：

<Data>
   <Record>
      <Author>A1</Author>
      <Author>A2</Author>
      <Author>A3</Author>
      <Author>B2</Author>
      <Date>10/12/2019</Date>
      <Key>12345</Key>
      <Number>09095I</Number>
      <Summary>Record 1: Summary 1 Text</Summary>
      <Summary>Record 2: Summary 1 Text</Summary>
      <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
      <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
      <Text_Field_2>This is Text Field 2</Text_Field_2>
      <Text_Field_2>This is Text_Field_2</Text_Field_2>
   </Record>
   <Record>
      <Author>AA2</Author>
      <Author>AA1</Author>
      <Author>AA3</Author>
      <Author>BB2</Author>
      <Author>CC2</Author>
      <Author>CC3</Author>
      <Date>01/12/2020</Date>
      <Key>23456</Key>
      <Number>43095I</Number>
      <Summary>Record 1: Summary 1 Text</Summary>
      <Summary>Record 2: Summary 1 Text</Summary>
      <Summary>Record 3: Summary 1 Text</Summary>
      <Text_Field_1>Record 1: This is Text Field 1</Text_Field_1>
      <Text_Field_1>Record 2: This is Text Field 1</Text_Field_1>
      <Text_Field_1>Record 3: This is Text Field 1</Text_Field_1>
      <Text_Field_2>This is Text_Field_2</Text_Field_2>
   </Record>
   <Record>
      <Author>A2</Author>
      <Author>D1</Author>
      <Author>D2</Author>
      <Author>D3</Author>
      <Author>D33</Author>
      <Date>10/12/2019</Date>
      <Key>778899</Key>
      <Number>998822I</Number>
      <Summary>Record 1: Summary 1 Text</Summary>
      <Text_Field_1>Record 1: This is Text_Field_1</Text_Field_1>
      <Text_Field_2>This is Text_Field_2</Text_Field_2>
   </Record>
</Data>

附錄：也可以按名稱強制執行兒童順序...

解決方案3
 1  2020-01-29 10:09:38

由於我們已經有了 XSLT 1 和 XSLT 2 解決方案，為了完整起見，這里使用xsl:merge的 XSLT 3 解決方案：

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    exclude-result-prefixes="#all"
    version="3.0">

  <xsl:output indent="yes"/>

  <xsl:mode on-no-match="shallow-copy"/>

  <xsl:template match="Data">
      <xsl:copy>
          <xsl:merge>
              <xsl:merge-source select="Record">
                  <xsl:merge-key select="Key"/>
              </xsl:merge-source>
              <xsl:merge-action>
                  <xsl:copy>
                      <xsl:merge>
                          <xsl:merge-source select="current-merge-group()/*[normalize-space()]" sort-before-merge="yes">
                              <xsl:merge-key select="name()"/>
                              <xsl:merge-key select="."/>
                          </xsl:merge-source>
                          <xsl:merge-action>
                              <xsl:copy-of select="."/>
                          </xsl:merge-action>
                      </xsl:merge>
                  </xsl:copy>
              </xsl:merge-action>
          </xsl:merge>
      </xsl:copy>
  </xsl:template>

</xsl:stylesheet>

https://xsltfiddle.liberty-development.net/gWEaSv5

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