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我正在尝试根据其他一些值填充创建的日期时间。如果插入日期为空，则现在应输入，否则将显示插入日期。见下面的输入

<?xml version="1.0"?>
<a>
    <x>
        <id>468441</id>
        <fields>
            <field name="createdDateTime"/>
            <field name="x">1</field>
        </fields>
        <b>
            <queryResults>
                <record id="1">
                    <column name="Now">2014-06-12T16:05:18+03:00</column>
                    <column name="InsertionDate"/>
                </record>
            </queryResults>
        </b>
    </x>
    <x>
        <id>468440</id>
        <fields>
            <field name="createdDateTime"/>
            <field name="x"/>
        </fields>
        <b>
            <queryResults>
                <record id="1">
                    <column name="Now">2014-06-12T16:05:18+03:00</column>
                    <column name="InsertionDate">2015-06-12T15:25:28+03:00</column>
                </record>
            </queryResults>
        </b>
    </x>
</a>

所需的输出是

<?xml version="1.0"?>
<a>
    <x>
        <id>468441</id>
        <fields>
            <field name="createdDateTime">2014-06-12T16:05:18+03:00</field>
            <field name="x">1</field>
        </fields>
        <b>
            <queryResults>
                <record id="1">
                    <column name="Now">2014-06-12T16:05:18+03:00</column>
                    <column name="InsertionDate"/>
                </record>
            </queryResults>
        </b>
    </x>
    <x>
        <id>468440</id>
        <fields>
            <field name="createdDateTime">2015-06-12T15:25:28+03:00</field>
            <field name="x"/>
        </fields>
        <b>
            <queryResults>
                <record id="1">
                    <column name="Now">2014-06-12T16:05:18+03:00</column>
                    <column name="InsertionDate">2015-06-12T15:25:28+03:00</column>
                </record>
            </queryResults>
        </b>
    </x>
</a>

请参阅下面我的 xslt 1.0 代码，但它没有返回所需的输出

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
    <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
    <xsl:template match="@*|node()">
        <xsl:copy>
            <xsl:apply-templates select="@*|node()"/>
        </xsl:copy>
    </xsl:template>
     <xsl:template match="field[@name='createdDateTime']">
                        <field name="createdDateTime">
            <xsl:choose>
                <xsl:when test="././b/queryResults/record/column[@name='InsertionDate'] =''  ">
                    <xsl:value-of select="././b/queryResults/record/column[@name='Now']"/>
                </xsl:when>
                <xsl:otherwise>
                    <xsl:value-of select="././b/queryResults/record/column[@name='InsertionDate']"/>
                </xsl:otherwise>
            </xsl:choose>
        </field>
    </xsl:template>
</xsl:stylesheet>
4

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