我有一个 XSLT，它正在创建一个数据显示，按学科、学位和班级对大学课程进行分组。
XSLT 不知何故创建了重复数据。每当元素<COURSEORAND1>和<GROUPORAND1>为空时，它都会重复该类列表一次或多次（至少这是我的猜测）。在某些情况下，它会创建十几个重复项。该类仅在基础 XML 中出现一次。
我不知道是什么导致 XSLT 复制数据。
这是 XSLT：
<?xml version="1.0"?>
<!-- DWXMLSource="STX049-2-21-13-parsed.xml" -->
<!DOCTYPE xsl:stylesheet>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="no"/>
<xsl:variable name="allSections" select="/CrystalReport/Group/Group/Group/Details/Section" />
<xsl:key name="kArea" match="Section" use="ACPGAREAOFSTUDY1"/>
<xsl:key name="kDegree" match="Section" use="concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1)" />
<xsl:key name="kDepartment" match="Section" use="concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1, '+', ICCB1)" />
<xsl:variable name="degreeFirsts" select="$allSections[generate-id() = generate-id(key('kDegree', concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1))[1])]" />
<xsl:variable name="deptFirsts" select="$allSections[generate-id() = generate-id(key('kDepartment', concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1, '+', ICCB1))[1])]" />
<xsl:template match="/">
<CrystalReport>
<Degrees>
<xsl:apply-templates select="$allSections[generate-id() = generate-id(key('kArea', ACPGAREAOFSTUDY1)[1])]" mode="group"/>
</Degrees>
</CrystalReport>
</xsl:template>
<xsl:template match="Section" mode="group">
<xsl:variable name="area" select="ACPGAREAOFSTUDY1" />
<xsl:text>
</xsl:text>
<areaofstudy>
<xsl:value-of select="$area"/>
</areaofstudy>
<xsl:apply-templates select="$degreeFirsts[ACPGAREAOFSTUDY1 = $area]" mode="degree"/>
</xsl:template>
<xsl:template match="Section" mode="degree">
<xsl:variable name="area" select="ACPGAREAOFSTUDY1" />
<xsl:variable name="degree" select="ACPGDEGREE1" />
<Degree>
<xsl:apply-templates select="$deptFirsts[ACPGAREAOFSTUDY1 = $area and ACPGDEGREE1 = $degree]" mode="department">
<xsl:sort select="ACADPROGRAMSID1" />
</xsl:apply-templates>
</Degree>
</xsl:template>
<xsl:template match="Section" mode="department">
<department>
<xsl:text>
</xsl:text>
<Degreetitle>
<xsl:apply-templates select="ACPGDEGREE1" />
</Degreetitle>
<Certtitle>
<xsl:apply-templates select="CCD11" />
</Certtitle>
<xsl:text>
</xsl:text>
<DegreeDesc>
<xsl:apply-templates select="ACPGCOMMENTS1" />
</DegreeDesc>
<xsl:text>
ICCB Code </xsl:text>
<ICCBcode>
<xsl:apply-templates select="ICCB1" />
</ICCBcode>
<xsl:text> | Field of Study Code: </xsl:text>
<ProgramID>
<xsl:apply-templates select="ACADPROGRAMSID1" />
</ProgramID>
<xsl:variable name="courses" select="key('kDepartment', concat(ACPGAREAOFSTUDY1, '+', ACPGDEGREE1, '+', ICCB1))" />
<xsl:call-template name="CourseGroup">
<xsl:with-param name="courses" select="$courses[FlagElectives1 = 'N']" />
<xsl:with-param name="title" select="'Program Requirements'" />
<xsl:with-param name="requiredCourses" select="true()" />
</xsl:call-template>
<xsl:call-template name="CourseGroup">
<xsl:with-param name="courses" select="$courses[FlagElectives1 = 'Y']" />
<xsl:with-param name="title" select="'Program Electives'" />
</xsl:call-template>
<xsl:apply-templates select="ACPGHOMELANGNOTREQDRSN1" />
</department>
</xsl:template>
<xsl:template name="CourseGroup">
<xsl:param name="courses" />
<xsl:param name="title" />
<xsl:param name="requiredCourses" select="false()" />
<xsl:if test="$courses">
<xsl:text>
</xsl:text>
<req-electitle>
<xsl:value-of select="$title" />
</req-electitle>
<xsl:apply-templates select="$courses">
<xsl:sort select="FlagElectives1" order="ascending" />
<xsl:sort select="CRSSUBJECT1" />
<xsl:sort select="GROUPLABEL1" />
<xsl:sort select="CRSNO1" />
</xsl:apply-templates>
<xsl:if test="$requiredCourses">
<xsl:text>
</xsl:text>
<credit-sum>
<xsl:value-of select='format-number(sum($courses/CRSMINCRED1),"##")'/>
</credit-sum>
</xsl:if>
</xsl:if>
</xsl:template>
<xsl:template match="Section">
<xsl:text>
</xsl:text>
<Details>
<class>
<deptname>
<xsl:apply-templates select="CRSSUBJECT1" />
</deptname>
<xsl:text> </xsl:text>
<courseno>
<xsl:apply-templates select="CRSNO1" />
</courseno>
<xsl:text> </xsl:text>
<classname>
<xsl:apply-templates select="CRSTITLE1" />
</classname>
<xsl:text> </xsl:text>
<classcredit>
<xsl:apply-templates select="CRSMINCRED1" />
</classcredit>
<xsl:apply-templates select="CRSMAXCRED1" />
</class>
</Details>
</xsl:template>
<xsl:template match="ACPGHOMELANGNOTREQDRSN1[string-length() != 0]">
<xsl:text>
</xsl:text>
<totalcredits>
<xsl:value-of select="normalize-space(.)" />
</totalcredits>
</xsl:template>
<xsl:template match="CRSMAXCRED1[string-length() != 0]">
<xsl:text> to </xsl:text>
<maxcredits>
<xsl:value-of select="normalize-space(.)" />
</maxcredits>
</xsl:template>
<xsl:template match="ACPGDEGREE1/text()">
<xsl:value-of select="concat(., ' DEGREE')"/>
</xsl:template>
<xsl:template match="CCD11/text()">
<xsl:value-of select="('CERTIFICATE')" />
</xsl:template>
</xsl:stylesheet>
这是 XML 的示例：
<?xml version="1.0" encoding="UTF-8"?>
<CrystalReport>
<Group Level="1">
<Group Level="2">
<Group Level="3">
<Details Level="4">
<Section SectionNumber="0">
<ACPGDEGREE1>AAS</ACPGDEGREE1>
<CCD11/>
<ACPGCOMMENTS1>The Accounting program is designed to provide the theoretical and practical background necessary for supervisory and administrative careers in accounting and accounting-related areas. This degree requires a minimum of 64 credits in program requirements, program electives, and general education as listed below.</ACPGCOMMENTS1>
<ICCB1>3203</ICCB1>
<ACADPROGRAMSID1>ACCOU.AAS</ACADPROGRAMSID1>
<CRSNO1>1150</CRSNO1>
<ACPGHOMELANGNOTREQDRSN1>General Education - 12 to 16 credit hours (In addition to those listed above) Total Credits Required - 64 to 70</ACPGHOMELANGNOTREQDRSN1>
<CRSMINCRED1>3</CRSMINCRED1>
<ACPGAREAOFSTUDY1>Accounting</ACPGAREAOFSTUDY1>
<CRSTITLE1>Intro to Computer Information Systems</CRSTITLE1>
<DEPARTMENT11>ACCOU</DEPARTMENT11>
<ACRBLABEL1>CIS REQUIREMENT</ACRBLABEL1>
<CRSMAXCRED1/>
<FlagElectives1>N</FlagElectives1>
<CRSSUBJECT1>CIS</CRSSUBJECT1>
<COURSEORAND1>OR</COURSEORAND1>
<GROUPORAND1/>
<ACADREQMTBLOCKSID1>16316</ACADREQMTBLOCKSID1>
<GROUPLABEL1>Group 1</GROUPLABEL1>
</Section>
</Details>
<Details Level="4">
<Section SectionNumber="0">
<ACPGDEGREE1>AAS</ACPGDEGREE1>
<CCD11/>
<ACPGCOMMENTS1>The Accounting program is designed to provide the theoretical and practical background necessary for supervisory and administrative careers in accounting and accounting-related areas. This degree requires a minimum of 64 credits in program requirements, program electives, and general education as listed below.</ACPGCOMMENTS1>
<ICCB1>3203</ICCB1>
<ACADPROGRAMSID1>ACCOU.AAS</ACADPROGRAMSID1>
<CRSNO1>1110</CRSNO1>
<ACPGHOMELANGNOTREQDRSN1>General Education - 12 to 16 credit hours (In addition to those listed above) Total Credits Required - 64 to 70</ACPGHOMELANGNOTREQDRSN1>
<CRSMINCRED1>2</CRSMINCRED1>
<ACPGAREAOFSTUDY1>Accounting</ACPGAREAOFSTUDY1>
<CRSTITLE1>Using Computers: An Introduction</CRSTITLE1>
<DEPARTMENT11>ACCOU</DEPARTMENT11>
<ACRBLABEL1>CIS REQUIREMENT</ACRBLABEL1>
<CRSMAXCRED1/>
<FlagElectives1>N</FlagElectives1>
<CRSSUBJECT1>CIS</CRSSUBJECT1>
<COURSEORAND1>OR</COURSEORAND1>
<GROUPORAND1/>
<ACADREQMTBLOCKSID1>16316</ACADREQMTBLOCKSID1>
<GROUPLABEL1>Group 1</GROUPLABEL1>
</Section>
</Details>
</Group>
<Group Level="3">
<Details Level="4">
<Section SectionNumber="0">
<ACPGDEGREE1>AAS</ACPGDEGREE1>
<CCD11/>
<ACPGCOMMENTS1>The Accounting program is designed to provide the theoretical and practical background necessary for supervisory and administrative careers in accounting and accounting-related areas. This degree requires a minimum of 64 credits in program requirements, program electives, and general education as listed below.</ACPGCOMMENTS1>
<ICCB1>3203</ICCB1>
<ACADPROGRAMSID1>ACCOU.AAS</ACADPROGRAMSID1>
<CRSNO1>1100</CRSNO1>
<ACPGHOMELANGNOTREQDRSN1>General Education - 12 to 16 credit hours (In addition to those listed above) Total Credits Required - 64 to 70</ACPGHOMELANGNOTREQDRSN1>
<CRSMINCRED1>2</CRSMINCRED1>
<ACPGAREAOFSTUDY1>Accounting</ACPGAREAOFSTUDY1>
<CRSTITLE1>Introduction to Computer Keyboarding</CRSTITLE1>
<DEPARTMENT11>ACCOU</DEPARTMENT11>
<ACRBLABEL1>OFTI REQUIREMENT</ACRBLABEL1>
<CRSMAXCRED1/>
<FlagElectives1>N</FlagElectives1>
<CRSSUBJECT1>OFTI</CRSSUBJECT1>
<COURSEORAND1>OR</COURSEORAND1>
<GROUPORAND1/>
<ACADREQMTBLOCKSID1>16318</ACADREQMTBLOCKSID1>
<GROUPLABEL1>Group 1</GROUPLABEL1>
</Section>
</Details>
<Details Level="4">
<Section SectionNumber="0">
<ACPGDEGREE1>AAS</ACPGDEGREE1>
<CCD11/>
<ACPGCOMMENTS1>The Accounting program is designed to provide the theoretical and practical background necessary for supervisory and administrative careers in accounting and accounting-related areas. This degree requires a minimum of 64 credits in program requirements, program electives, and general education as listed below.</ACPGCOMMENTS1>
<ICCB1>3203</ICCB1>
<ACADPROGRAMSID1>ACCOU.AAS</ACADPROGRAMSID1>
<CRSNO1>1210</CRSNO1>
<ACPGHOMELANGNOTREQDRSN1>General Education - 12 to 16 credit hours (In addition to those listed above) Total Credits Required - 64 to 70</ACPGHOMELANGNOTREQDRSN1>
<CRSMINCRED1>3</CRSMINCRED1>
<ACPGAREAOFSTUDY1>Accounting</ACPGAREAOFSTUDY1>
<CRSTITLE1>Word Processing I</CRSTITLE1>
<DEPARTMENT11>ACCOU</DEPARTMENT11>
<ACRBLABEL1>OFTI REQUIREMENT</ACRBLABEL1>
<CRSMAXCRED1/>
<FlagElectives1>N</FlagElectives1>
<CRSSUBJECT1>OFTI</CRSSUBJECT1>
<COURSEORAND1>OR</COURSEORAND1>
<GROUPORAND1/>
<ACADREQMTBLOCKSID1>16318</ACADREQMTBLOCKSID1>
<GROUPLABEL1>Group 1</GROUPLABEL1>
</Section>
</Details>
</Group>
</Group>
</Group>
</CrystalReport>
注意：XML 只是一个小示例，我在此链接中放置了一个较大的示例：http: //pastebin.com/Y4J2VDRd
我注意到它只有在运行整个文件时才会发生。较短的样本不会重复。但是，如果您在 Pastebin 上查看我的示例，您会看到<courseno>1175</courseno> <classname>Microcomputer Accounting</classname>并<courseno>1100</courseno> <classname>Business Mathematics</classname>重复两次，在更大的 XML 中，您会看到随着您深入数据，类会重复多次。
这是预期的文本输出：
AAS DEGREE
The Accounting degree program is designed to provide the theoretical and practical background necessary for supervisory and administrative careers in accounting and accounting-related areas. This degree program requires a minimum of 64 credits in program requirements, program electives and general education as listed below.
ICCB Code 3203 | Field of Study Code: ACCOU.AAS
Program Requirements
Accou 1140 Financial Accounting............................................4
Accou 1150 Managerial Accounting...........................................4
Accou 2205 Federal Taxation I .............................................3
Accou 2241 Intermediate Accounting I.......................................4
Accou 2242 Intermediate Accounting II......................................4
Accou 2251 Cost Accounting.................................................3
Busin 1100 Introduction to Business .......................................3
Cis 1150 Introduction to Computer Information Systems .....................3
OR
Cis 1110 Using Computers: An Introduction..................................2
Econo 2201 Macroeconomics and the Global Economy ..........................3
Ofti 1100 Introduction to Computer Keyboarding ............................2
OR
Ofti 1210 Word Processing I................................................3
Philo 1114 Business Ethics ................................................3
(Total Credits) 35