XSL查找节点之间的所有节点

时间：2010-10-27 17:44:04

标签： xslt xslt-2.0

我有一个格式不正确的XML文件，其中与单个订单项相关的信息被分成多行信息，我正在尝试与父订单项（ITEM_ID）进行分组。信息是顺序的，因此密钥是ITEM_ID节点，但是我似乎无法创建将项目相关信息（ITEM_ID）分组所需的正确XSL，给定以下XML源（已更新以包含新发现的孙元素） XML源代码：

<LINE_INFO>
    <ITEM_ID>some_part_num</ITEM_ID>
    <DESC>some_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
</LINE_INFO>
<LINE_INFO>
    <EXT_DESC>more_description_for_some_part_num</EXT_DESC>
</LINE_INFO>
<LINE_INFO>
    <ITEM_ID>some_other_part_num</ITEM_ID>
    <DESC>some_other_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
</LINE_INFO>
<LINE_INFO>
    <EXT_DESC>more_description_for_some_other_part_num</EXT_DESC>
</LINE_INFO>
<LINE_INFO>
    <LINE_NOTE>This is a note related to some_other_part_num</LINE_NOTE>
</LINE_INFO>
<LINE_INFO>
    <ADDTL_NOTE_DETAIL>
        <NOTE>This is the grandchild note that sometimes appears in my data</NOTE>
    </ADDTL_NOTE_DETAIL>
</LINE_INFO>
<LINE_INFO>
    <ITEM_ID>yet_another_part_num</ITEM_ID>
    <DESC>yet_another_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
</LINE_INFO>
  ...

期望的输出：

<LINE_INFO>
    <ITEM_ID>some_part_num</ITEM_ID>
    <DESC>some_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
    <EXT_DESC>more_description_for_some_part_num</EXT_DESC>
</LINE_INFO>
<LINE_INFO>
    <ITEM_ID>some_other_part_num</ITEM_ID>
    <DESC>some_other_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
    <EXT_DESC>more_description_for_some_other_part_num</EXT_DESC>
    <LINE_NOTE>This is a note related to some_other_part_num</LINE_NOTE>
    <NOTE>This is the grandchild note that sometimes appears in my data</NOTE>
</LINE_INFO>
<LINE_INFO>
    <ITEM_ID>yet_another_part_num</ITEM_ID>
    <DESC>yet_another_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
</LINE_INFO>

3 个答案:

答案 0 :(得分：2)

此转化：

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:key name="kFollowing" match="LINE_INFO[not(ITEM_ID)]"
 use="generate-id(preceding-sibling::LINE_INFO[ITEM_ID][1])"/>

 <xsl:template match="node()|@*">
  <xsl:copy>
   <xsl:apply-templates select="node()|@*"/>
  </xsl:copy>
 </xsl:template>

 <xsl:template match="LINE_INFO[ITEM_ID]">
  <xsl:copy>
   <xsl:apply-templates select="node()|@*"/>

   <xsl:apply-templates select="key('kFollowing', generate-id())/node()"/>
  </xsl:copy>
 </xsl:template>

 <xsl:template match="LINE_INFO[not(ITEM_ID)]"/>
</xsl:stylesheet>

应用于提供的XML文档（包装在单个顶部元素中以使其格式良好）：

<t>
    <LINE_INFO>
        <ITEM_ID>some_part_num</ITEM_ID>
        <DESC>some_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
    </LINE_INFO>
    <LINE_INFO>
        <EXT_DESC>more_description_for_some_part_num</EXT_DESC>
    </LINE_INFO>
    <LINE_INFO>
        <ITEM_ID>some_other_part_num</ITEM_ID>
        <DESC>some_other_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
    </LINE_INFO>
    <LINE_INFO>
        <EXT_DESC>more_description_for_some_other_part_num</EXT_DESC>
    </LINE_INFO>
    <LINE_INFO>
        <LINE_NOTE>This is a note related to some_other_part_num</LINE_NOTE>
    </LINE_INFO>
    <LINE_INFO>
        <ITEM_ID>yet_another_part_num</ITEM_ID>
        <DESC>yet_another_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
    </LINE_INFO>
</t>

生成想要的正确结果：

<t>
    <LINE_INFO>
        <ITEM_ID>some_part_num</ITEM_ID>
        <DESC>some_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
        <EXT_DESC>more_description_for_some_part_num</EXT_DESC>
    </LINE_INFO>
    <LINE_INFO>
        <ITEM_ID>some_other_part_num</ITEM_ID>
        <DESC>some_other_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
        <EXT_DESC>more_description_for_some_other_part_num</EXT_DESC>
        <LINE_NOTE>This is a note related to some_other_part_num</LINE_NOTE>
    </LINE_INFO>
    <LINE_INFO>
        <ITEM_ID>yet_another_part_num</ITEM_ID>
        <DESC>yet_another_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
    </LINE_INFO>
</t>

请注意：使用密钥轻松有效地识别没有LINE_INFO子节点且紧跟ITEM_ID个节点的所有LINE_INFO个节点一个ITEM_ID孩子。

答案 1 :(得分：1)

这是一个经典的分组问题。最好的方法取决于您是否拥有XSLT 2.0，或者必须使用1.0。

如果是2.0，您需要使用<xsl:for-each-group>：

<table>
   <xsl:for-each-group select="LINE_INFO" group-starting-with="LINE_INFO[ITEM_ID]">

select和group-starting-with的上述XPath表达式假设上下文节点是LINE_INFO元素的父节点。或者，您可以将//放在两个表达式的前面，但可能会降低性能。

为每个组输出一行，根据您最近的评论将数据放入表格单元格中：

      <tr>
         <td><xsl:value-of select="current-group()/ITEM_ID" /></td>
         <td>
           <xsl:value-of "concat(current-group()/DESC, current-group()/EXT_DESC)"/>
           <br />
           <xsl:value-of "concat(current-group()/LINE_NOTE)" />
           <br />
           <xsl:value-of "concat(current-group()/NOTE)" />
         </td>
         <td><xsl:value-of select="current-group()/QTY" /></td>
         <td><xsl:value-of select="current-group()/ADDTL_NOTE_DETAIL/NOTE" /></td>
      </tr>
   </xsl:for-each-group>
</table>

（由于OP有XSLT 2.0，这个答案的其余部分已经过时了。）

如果是1.0，那么最好的选择是Muenchian grouping。对于识别组的步骤（步骤1），您将使用类似

的键 
<xsl:key name="LINE_INFO-by-section" match="LINE_INFO"
    use="generate-id((. | preceding-sibling::LINE_INFO)[ITEM_ID][last()])" />

迭代群组：

<xsl:for-each select="LINE_INFO[ITEM_ID]">
   <xsl:copy>

迭代群组成员：

      <xsl:variable name="section-starter-id" select="generate-id(.)" />
      <xsl:for-each select="key('LINE_INFO-by-section', $section-starter-id))">
         <xsl:copy-of select="node()|@*" />
      </xsl:for-each>
   </xsl:copy>
</xsl:for-each>

（未测试）。

答案 2 :(得分：1)

这个XSLT 2.0样式表：

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output indent="yes"/>
    <xsl:template match="node()|@*">
        <xsl:copy>
            <xsl:apply-templates select="node()|@*"/>
        </xsl:copy>
    </xsl:template>
    <xsl:template match="root">
        <xsl:for-each-group select="LINE_INFO"
                            group-starting-with="LINE_INFO[ITEM_ID]">
            <xsl:copy>
                <xsl:apply-templates select="current-group()/node()"/>
            </xsl:copy>
        </xsl:for-each-group>
    </xsl:template>
</xsl:stylesheet>

使用此输入：

<root>
    <LINE_INFO>
        <ITEM_ID>some_part_num</ITEM_ID>
        <DESC>some_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
    </LINE_INFO>
    <LINE_INFO>
        <EXT_DESC>more_description_for_some_part_num</EXT_DESC>
    </LINE_INFO>
    <LINE_INFO>
        <ITEM_ID>some_other_part_num</ITEM_ID>
        <DESC>some_other_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
    </LINE_INFO>
    <LINE_INFO>
        <EXT_DESC>more_description_for_some_other_part_num</EXT_DESC>
    </LINE_INFO>
    <LINE_INFO>
        <LINE_NOTE>This is a note related to some_other_part_num</LINE_NOTE>
    </LINE_INFO>
    <LINE_INFO>
        <ITEM_ID>yet_another_part_num</ITEM_ID>
        <DESC>yet_another_part_num_description</DESC>
        <QTY>nn</QTY>
        <UNIT>uom</UNIT>
    </LINE_INFO>
</root>

输出：

<LINE_INFO>
    <ITEM_ID>some_part_num</ITEM_ID>
    <DESC>some_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
    <EXT_DESC>more_description_for_some_part_num</EXT_DESC>
</LINE_INFO>
<LINE_INFO>
    <ITEM_ID>some_other_part_num</ITEM_ID>
    <DESC>some_other_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
    <EXT_DESC>more_description_for_some_other_part_num</EXT_DESC>
    <LINE_NOTE>This is a note related to some_other_part_num</LINE_NOTE>
</LINE_INFO>
<LINE_INFO>
    <ITEM_ID>yet_another_part_num</ITEM_ID>
    <DESC>yet_another_part_num_description</DESC>
    <QTY>nn</QTY>
    <UNIT>uom</UNIT>
</LINE_INFO>
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