Question

我是XSLT的新手，并试图弄清楚如何使用它来改变这个XML：

<people>
    <person>
        <role>Parent</role>
        <lastname>Smith</lastname>
        <locations>
            <location>
                <city>Springfield</city>
                <state>MA</state>
                <unimportant-field>123</unimportant-field>
            </location>
            <location>
                <city>Chicago</city>
                <state>IL</state>
                <unimportant-field>456</unimportant-field>
            </location>
        </locations>
    </person>
    <person>
        <role>Child</role>
        <lastname>Smith</lastname>
        <locations>
            <location>
                <city>Springfield</city>
                <state>IL</state>
                <unimportant-field>789</unimportant-field>
            </location>
            <location>
                <city>Chicago</city>
                <state>IL</state>
                <unimportant-field>000</unimportant-field>
            </location>
            <location>
                <city>Washington</city>
                <state>DC</state>
                <unimportant-field>555</unimportant-field>
            </location>
        </locations>
    </person>
</people>

进入

<people>
    <person>
        <role>Parent</role>
        <lastname>Smith</lastname>
        <locations>
            <location>
                <city>Springfield</city>
                <state>MA</state>
                <unimportant-field>123</unimportant-field>
            </location>
            <location>
                <city>Chicago</city>
                <state>IL</state>
                <unimportant-field>456</unimportant-field>
            </location>
        </locations>
    </person>
    <person>
        <role>Child</role>
        <lastname>Smith</lastname>
        <locations>
            <location>
                <city>Chicago</city>
                <state>IL</state>
                <unimportant-field>000</unimportant-field>
            </location>
        </locations>
    </person>
</people>

基本上正在发生的是有一个伪层次结构，我需要过滤掉“子”元素中不存在于“parent”元素中的位置。子元素通过姓氏与其父元素相关联。但是，每个位置的“不重要字段”在父节点和子节点之间不匹配，但不应影响过滤。

现在我正在尝试使用它：

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

    <xsl:template match="/people">
        <people>
          <xsl:apply-templates select="person"/>
        </people>
    </xsl:template>

    <xsl:template match="person">
        <person>
            <xsl:copy-of select="role" /> 
            <xsl:copy-of select="lastname" /> 
            <xsl:apply-templates select="locations"/>
        </person>
    </xsl:template>

    <xsl:template match="locations">
        <locations>
            <xsl:apply-templates select="location[city = /people/person[role = 'Parent' and lastname = current()/../lastname]/locations/location/city and state = /people/person[role = 'Parent' and lastname = current()/../lastname]/locations/location/state]"/>
        </locations>
    </xsl:template>

    <xsl:template match="location">
        <location>
            <xsl:copy-of select="city" />
            <xsl:copy-of select="state" />
            <xsl:copy-of select="unimportant-field" />
        </location>
    </xsl:template>

</xsl:stylesheet>

问题是它保留了孩子的Springfield，IL元素，因为它独立地检查城市是否存在于父母的任何地方，以及状态是否存在于父母的任何地方。我需要做的是弄清楚城市和州的组合是否存在于父母的单一位置，同时仍然忽略“不重要的领域”。我不知道怎么做。

Answer 1

以这种方式试试吗？

XSLT 1.0

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>

<xsl:key name="parent-location" match="person[role='Parent']/locations/location" use="concat(../../lastname, '|', city, '|', state)" />

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

<xsl:template match="person[role='Child']/locations/location[not(key('parent-location', concat(../../lastname, '|', city, '|', state)))]"/>

</xsl:stylesheet>

XSLT动态过滤多个元素

1 个答案: