Have couple of element with same Parent and child node.
So need to remove the duplicates.
预期的输出应使用XSLT。 提前致谢 在输入XML中，存在具有相同子节点的元素，我需要根据标签属性值删除该元素。如果两个标签中的属性值相同（“ identity”属性），则应删除整个重复标签并仅显示一次
Input XML file:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<MainDeclaration xmlns="http://webstds.ipc.org/175x/2.0" version="2.0">
<Product comment="1. This is a generic description of the substances as the actual compostion of the substances are either considered proprietary or no official CAS number is available. If a CAS number is given, it is the closest match available." unitType="Each">
<MaterialInfo>
<ExemptionList>
<ExemptionListID authority="IPC" identity="EL2011/534/EU"/>
<Exemption description="Lead in high melting temperature type solders (i.e., lead based solder alloys containing 85% by weight or more lead)" identity="7(a)"/>
</ExemptionList>
<ExemptionList>
<ExemptionListID authority="IPC" identity="EL2011/534/EU"/>
<Exemption description="Lead in high melting temperature type solders (i.e., lead based solder alloys containing 85% by weight or more lead)" identity="7(a)"/>
</ExemptionList>
<HomogeneousMaterialList>
<HomogeneousMaterial materialGroupName="Other Non-ferrous Metals and Alloys" name="Solder Paste 1">
<Amount UOM="mg" value="7.02"/>
<SubstanceCategoryList>
<SubstanceCategoryListID authority="IPC" identity="EUROHS-0508"/>
<SubstanceCategory name="Lead/lead compounds">
<Substance name="Lead">
<SubstanceID authority="CAS" identity="7439-92-1"/>
<Amount UOM="mg" value="6.4935"/>
<SubstanceExemption description="Lead in high melting temperature type solders (i.e., lead based solder alloys containing 85% by weight or more lead)" identity="7(a)"/>
</Substance>
<SubstanceCatExemptionList>
<ExemptionListID authority="IPC" identity="EL2011/534/EU"/>
<Exemption description="Lead in high melting temperature type solders (i.e., lead based solder alloys containing 85% by weight or more lead)" identity="7(a)"/>
</SubstanceCatExemptionList>
</SubstanceCategory>
</SubstanceCategoryList>
<SubstanceCategoryList>
<SubstanceCategoryListID authority="Supplier" identity="Supplier"/>
<SubstanceCategory name="Lead alloy">
<Substance name="Silver (Ag)">
<SubstanceID authority="CAS" identity="7440-22-4"/>
<Amount UOM="mg" value="0.1755"/>
</Substance>
</SubstanceCategory>
</SubstanceCategoryList>
<SubstanceCategoryList>
<SubstanceCategoryListID authority="Supplier" identity="Supplier"/>
<SubstanceCategory name="Lead alloy">
<Substance name="Tin (Sn)">
<SubstanceID authority="CAS" identity="7440-31-5"/>
<Amount UOM="mg" value="0.351"/>
</Substance>
</SubstanceCategory>
</SubstanceCategoryList>
</HomogeneousMaterial>
<HomogeneousMaterial materialGroupName="Other Non-ferrous Metals and Alloys" name="Post-plating">
<Amount UOM="mg" value="3.85"/>
<SubstanceCategoryList>
<SubstanceCategoryListID authority="Supplier" identity="Supplier"/>
<SubstanceCategory name="Pure metal">
<Substance name="Tin (Sn)">
<SubstanceID authority="CAS" identity="7440-31-5"/>
<Amount UOM="mg" value="3.85"/>
</Substance>
</SubstanceCategory>
</SubstanceCategoryList>
</HomogeneousMaterial>
</HomogeneousMaterialList>
</MaterialInfo>
</Product>
</MainDeclaration>
Expected Output file:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<MainDeclaration xmlns="http://webstds.ipc.org/175x/2.0" version="2.0">
<Product comment="1. This is a generic description of the substances as the actual compostion of the substances are either considered proprietary or no official CAS number is available. If a CAS number is given, it is the closest match available." unitType="Each">
<MaterialInfo>
<ExemptionList>
<ExemptionListID authority="IPC" identity="EL2011/534/EU"/>
<Exemption description="Lead in high melting temperature type solders (i.e., lead based solder alloys containing 85% by weight or more lead)" identity="7(a)"/>
</ExemptionList>
<HomogeneousMaterialList>
<HomogeneousMaterial materialGroupName="Other Non-ferrous Metals and Alloys" name="Solder Paste 1">
<Amount UOM="mg" value="7.02"/>
<SubstanceCategoryList>
<SubstanceCategoryListID authority="IPC" identity="EUROHS-0508"/>
<SubstanceCategory name="Lead/lead compounds">
<Substance name="Lead">
<SubstanceID authority="CAS" identity="7439-92-1"/>
<Amount UOM="mg" value="6.4935"/>
<SubstanceExemption description="Lead in high melting temperature type solders (i.e., lead based solder alloys containing 85% by weight or more lead)" identity="7(a)"/>
</Substance>
<SubstanceCatExemptionList>
<ExemptionListID authority="IPC" identity="EL2011/534/EU"/>
<Exemption description="Lead in high melting temperature type solders (i.e., lead based solder alloys containing 85% by weight or more lead)" identity="7(a)"/>
</SubstanceCatExemptionList>
</SubstanceCategory>
</SubstanceCategoryList>
<SubstanceCategoryList>
<SubstanceCategoryListID authority="Supplier" identity="Supplier"/>
<SubstanceCategory name="Lead alloy">
<Substance name="Silver (Ag)">
<SubstanceID authority="CAS" identity="7440-22-4"/>
<Amount UOM="mg" value="0.1755"/>
</Substance>
</SubstanceCategory>
</SubstanceCategoryList>
<SubstanceCategoryList>
<SubstanceCategoryListID authority="Supplier" identity="Supplier"/>
<SubstanceCategory name="Lead alloy">
<Substance name="Tin (Sn)">
<SubstanceID authority="CAS" identity="7440-31-5"/>
<Amount UOM="mg" value="0.351"/>
</Substance>
</SubstanceCategory>
</SubstanceCategoryList>
</HomogeneousMaterial>
<HomogeneousMaterial materialGroupName="Other Non-ferrous Metals and Alloys" name="Post-plating">
<Amount UOM="mg" value="3.85"/>
<SubstanceCategoryList>
<SubstanceCategoryListID authority="Supplier" identity="Supplier"/>
<SubstanceCategory name="Pure metal">
<Substance name="Tin (Sn)">
<SubstanceID authority="CAS" identity="7440-31-5"/>
<Amount UOM="mg" value="3.85"/>
</Substance>
</SubstanceCategory>
</SubstanceCategoryList>
</HomogeneousMaterial>
</HomogeneousMaterialList>
</MaterialInfo>
</Product>
</MainDeclaration>
答案 0 :(得分：0)
在XSLT 3中，您可以执行以下操作：
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xpath-default-namespace="http://webstds.ipc.org/175x/2.0"
exclude-result-prefixes="#all"
version="3.0">
<xsl:strip-space elements="*"/>
<xsl:output indent="yes"/>
<xsl:mode on-no-match="shallow-copy"/>
<xsl:template match="*[ExemptionList]">
<xsl:copy>
<xsl:apply-templates select="@*"/>
<xsl:for-each-group select="*" composite="yes" group-by="boolean(self::ExemptionList), Exemption/@identity">
<xsl:choose>
<xsl:when test="head(current-grouping-key())">
<xsl:apply-templates select="."/>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates select="current-group()"/>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
Saxon 9.8或更高版本或AltovaXML 2017 R3或更高版本支持XSLT 3。