XSL 1.0-当子元素为Null时隐藏子节点

Question

我一直在尝试根据结构的子元素为空来隐藏它们。在阅读其他文章时，我发现如果子节点为空，则删除父节点，但我对它的理解不足以在XSL中实现它。我曾经尝试过将链接的帖子应用到XSL，但它并没有对我的输出做出所需的更改。

所以我的XML是这样的：

<?xml version="1.0" encoding="UTF-8" ?>
<exchange>
<sce>
<sce.srs>
<sce_scjc.sce.srs>140008305/1</sce_scjc.sce.srs>
<sce_seq2.sce.srs>01</sce_seq2.sce.srs>
<sce_stuc.sce.srs>140008305</sce_stuc.sce.srs>
<spr>
<spr.cams>
<spr_code.spr.cams>140008305/1</spr_code.spr.cams>
<prs_code.spr.cams>77711925</prs_code.spr.cams>
<prs>
<prs.mensys>
<prs_code.prs.mensys>77711925</prs_code.prs.mensys>
<prs_name.prs.mensys>Johan</prs_name.prs.mensys>
</prs.mensys>
</prs>
</spr.cams>
</spr>
</sce.srs>
<sce.srs>
<sce_scjc.sce.srs>151516736/1</sce_scjc.sce.srs>
<sce_seq2.sce.srs>01</sce_seq2.sce.srs>
<sce_stuc.sce.srs>151516736</sce_stuc.sce.srs>
<spr>
<spr.cams>
<spr_code.spr.cams>151516736/1</spr_code.spr.cams>
<prs_code.spr.cams>77709062</prs_code.spr.cams>
<prs>
<prs.mensys>
<prs_code.prs.mensys>77709062</prs_code.prs.mensys>
<prs_name.prs.mensys>Evangelia</prs_name.prs.mensys>
</prs.mensys>
</prs>
</spr.cams>
</spr>
</sce.srs>
<sce.srs>
<sce_scjc.sce.srs>150052468/1</sce_scjc.sce.srs>
<sce_seq2.sce.srs>01</sce_seq2.sce.srs>
<sce_stuc.sce.srs>150052468</sce_stuc.sce.srs>
<spr>
<spr.cams>
<spr_code.spr.cams>150052468/1</spr_code.spr.cams>
<prs_code.spr.cams/>
</spr.cams>
</spr>
</sce.srs>
</sce>
</exchange>

我的XSL看起来像下面的passaage。我添加了一个nil元素模板，因为我认为寻找一个值比寻找一个null更容易，所以如果不需要的话，它很乐意出现。

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xd="http://www.oxygenxml.com/ns/doc/xsl" exclude-result-prefixes="xd" version="1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/exchange/sce">
<ImportTask>
<EntityRelationshipEntities>
 <xsl:apply-templates select="node()|@*"/>
</EntityRelationshipEntities>
</ImportTask>
</xsl:template>
<xsl:template name="nilElement">
<xsl:param name="value"/>
<xsl:choose>
<xsl:when test="string($value)">
<xsl:value-of select="$value"/>
</xsl:when>
<xsl:otherwise>
<xsl:attribute name="xsi:nil" namespace="http://www.w3.org/2001/XMLSchema-instance">True</xsl:attribute>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template match="sce.srs[not(*/AttributeValue[not(@AttributeValue='True')])]">
<xsl:for-each select="spr/spr.cams">
<EntityRelationshipEntity>
<ErRef>ERREF_21</ErRef>
<EntityCode><xsl:value-of select="../../sce_stuc.sce.srs"/></EntityCode>
<AttributeValue>
<xsl:call-template name="nilElement">
<xsl:with-param name="value" select="prs/prs.mensys/prs_name.prs.mensys"/>
</xsl:call-template>
</AttributeValue>
<Action>VALUEONLY</Action>
</EntityRelationshipEntity>
</xsl:for-each>
</xsl:template>    
<xsl:template match="AttributeValue[@AttributeValue = 'True']"/>
</xsl:stylesheet>

因此，目前这给了我：

<ImportTask xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<EntityRelationshipEntities>
<EntityRelationshipEntity>
<ErRef>ERREF_21</ErRef>
<EntityCode>151514490</EntityCode>
<AttributeValue xsi:nil="True"/>
<Action>VALUEONLY</Action>
</EntityRelationshipEntity>
<EntityRelationshipEntity>
<ErRef>ERREF_21</ErRef>
<EntityCode>140008305</EntityCode>
<AttributeValue>Johan</AttributeValue>
<Action>VALUEONLY</Action>
</EntityRelationshipEntity>
<EntityRelationshipEntity>
<EntityCode>151516736</EntityCode>
<AttributeValue>Evangelia</AttributeValue>
<Action>VALUEONLY</Action>
</EntityRelationshipEntity>
</EntityRelationshipEntities>
</ImportTask>

我想制作的是那些不为空的东西。这意味着下面的子项没有输出：

<EntityRelationshipEntity>
<ErRef>ERREF_21</ErRef>
<EntityCode>151514490</EntityCode>
<AttributeValue xsi:nil="True"/>
<Action>VALUEONLY</Action>
</EntityRelationshipEntity>

但其他的输出是这样的：

<ImportTask xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<EntityRelationshipEntities>
<EntityRelationshipEntity>
<ErRef>ERREF_21</ErRef>
<EntityCode>140008305</EntityCode>
<AttributeValue>Johan</AttributeValue>
<Action>VALUEONLY</Action>
</EntityRelationshipEntity>
<EntityRelationshipEntity>
<EntityCode>151516736</EntityCode>
<AttributeValue>Evangelia</AttributeValue>
<Action>VALUEONLY</Action>
</EntityRelationshipEntity>
</EntityRelationshipEntities>
</ImportTask>

有人能帮我正确使用这个吗？

非常感谢

Jonah

Answer 1

也许我错过了什么，但这不可能只是：

XSLT 1.0

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" omit-xml-declaration="yes" version="1.0" encoding="utf-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/exchange/sce">
    <ImportTask xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
        <EntityRelationshipEntities>
            <xsl:apply-templates select="sce.srs/spr/spr.cams[string(prs/prs.mensys/prs_name.prs.mensys)]"/>
        </EntityRelationshipEntities>
    </ImportTask>
</xsl:template>
<xsl:template match="spr.cams">
    <EntityRelationshipEntity>
        <ErRef>ERREF_21</ErRef>
        <EntityCode>
            <xsl:value-of select="../../sce_stuc.sce.srs"/>
        </EntityCode>
        <AttributeValue>
            <xsl:value-of select="prs/prs.mensys/prs_name.prs.mensys"/>
        </AttributeValue>
        <Action>VALUEONLY</Action>
    </EntityRelationshipEntity>
</xsl:template>    
</xsl:stylesheet>