问题描述
我是xslt的初学者，所以不要介意我问基本问题。我想将第一个转换级别的结果用作另一个转换级别的输入。第一次转换的输入是一个target.xml文件，其中包含订阅者（“ aries”，“ cas” ...）：
<subscription-table>
<subscriber name="aries" useZipXfer="yes" usePubMed="no">
<ftp server="dummy.url1.com" port="21" remotedir="/XXXXXXX" userid="XXXXXXX" password="XXXXXXXXX" binary="yes" passive="no"/>
<notify-success>
<mail mailhost="smtprelayptc1.wkglobal.net" mailport="25" subject="MRCS-PS HEADER UPDATE - PAP">
<from address="[email protected]"/>
<to address="[email protected]"/>
</mail>
</notify-success>
<notify-failure>
<mail mailhost="smtprelayptc1.wkglobal.net" mailport="25" subject="MRCS-PS HEADER UPDATE - PAP">
<from address="[email protected]"/>
<to address="[email protected]"/>
</mail>
</notify-failure>
</subscriber>
<subscriber name="cas" useZipXfer="no" usePubMed="yes" sendPromote="no">
<ftp server="dummy.url2.com" port="21" remotedir="/YYYYYYY" userid="YYYYYYY" password="YYYYYYYYY" binary="yes" passive="no"/>
<notify-success>
<mail mailhost="smtprelayptc1.wkglobal.net" mailport="25" subject="MRCS-PS HEADER UPDATE - PAP">
<from address="[email protected]"/>
<to address="[email protected]"/>
</mail>
</notify-success>
<notify-failure>
<mail mailhost="smtprelayptc1.wkglobal.net" mailport="25" subject="MRCS-PS HEADER UPDATE - PAP">
<from address="[email protected]"/>
<to address="[email protected]"/>
</mail>
</notify-failure>
</subscriber>
</subscription-table>
每个订户都有自己的文件（aries_subscriptions.xml，cas_subscriptions.xml ...）。订阅文件包括日记。例如，aries_subscriptions.xml是：
<subscription>
<database status="update" name="ovftdb">
<journal status="*" name="00002030" >
<issue status="new" pubdate="01/01/2004" name="*" an="99999999-999999999-99999" >
<header/>
</issue>
</journal>
<journal status="*" name="00000374" >
<issue status="new" pubdate="01/01/2004" name="*" an="99999999-999999999-99999" >
<header/>
</issue>
</journal>
<journal status="*" name="00000372" >
<issue status="new" pubdate="01/01/2004" name="*" an="99999999-999999999-99999" >
<header/>
</issue>
</journal>
...
我需要生成第三个文件lookup.xml，该文件可以具有重复的日记，具体取决于订阅者（订阅者位于属性“ identifier”中）：
<?xml version="1.0" encoding="UTF-8"?>
<journals xmlns:xlink="http://www.w3.org/1999/xlink">
<journal name="00002030">
<target identifier="aries" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
<journal name="00000372">
<target identifier="aries" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
<journal name="00002030">
<target identifier="cas" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
<journal name="00000372">
<target identifier="cas" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
</journals>
我想使用xslt代码，该代码创建重复的日记，并生成具有唯一日记以及所有嵌套订户的文档。所需的文档将是：
<?xml version="1.0" encoding="UTF-8"?>
<journals xmlns:xlink="http://www.w3.org/1999/xlink"
<journal name="00002030">
<target identifier="aries" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
<target identifier="cas" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
<journal name="00000372">
<target identifier="aries" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
<target identifier="cas" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
</journals>
xslt的第一部分（创建重复的日记）是：
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:saxon="http://saxon.sf.net/"
exclude-result-prefixes="xs xsl saxon xlink">
<xsl:strip-space elements="*" />
<xsl:include href="utilities.xsl" />
<xsl:include href="assetTargetToLookupRemoveDuplicates.xsl"/>
<xsl:variable name="inputFolderAndFile">
<xsl:call-template
name="getValuesBeforeAndAfterLastOccurance">
<xsl:with-param name="inputString"
select="string(base-uri(.))" />
<xsl:with-param name="char" select="'/'" />
</xsl:call-template>
</xsl:variable>
<xsl:variable name="inputFolderPath"
select="substring-before($inputFolderAndFile,'*')" />
<xsl:variable name="inputFile"
select="substring-after($inputFolderAndFile,'*')" />
<xsl:variable name="tokens"
select="tokenize($inputFile,'\.')" />
<xsl:variable name="baseFileName"
select="string-join($tokens[not(.=$tokens[last()])],'.')" />
<xsl:template match="@* | * | comment() | processing-instruction()">
<xsl:apply-templates select="@* | node()" mode="package"/>
</xsl:template>
<xsl:template match="text()" mode="package">
<xsl:copy/>
</xsl:template>
<xsl:template match="/" mode="package">
<xsl:result-document method="xml" omit-xml-declaration="no" indent="yes" encoding="UTF-8" href="lookup.xml">
<xsl:variable name="initialOutput">
<xsl:apply-templates mode="package"/>
</xsl:variable>
<xsl:apply-templates select="$initialOutput" mode="remove-duplicates"/>
</xsl:result-document>
</xsl:template>
<xsl:template match="subscriber" mode="package">
<xsl:variable name="subscriberName" select="document(concat($inputFolderPath,'/',@name,'_subscriptions.xml'))" />
<xsl:element name="journals" namespace="http://www.w3.org/1999/xlink">
<xsl:apply-templates select="$subscriberName" mode="journal-processing"/>
</xsl:element>
</xsl:template>
<xsl:template match="journal" mode="journal-processing">
<xsl:variable name="journalName" select="@name" />
<xsl:variable name="journalPubDate" select="issue/@pubdate" />
<xsl:variable name="subscriberNameFromDoc" select="substring-before(tokenize(base-uri(),'/')[last()],'_subscriptions')" />
<xsl:element name="journal">
<xsl:attribute name="name" select="$journalName"/>
<xsl:element name="target">
<xsl:attribute name="identifier" select="$subscriberNameFromDoc"/>
<xsl:attribute name="pubdate" select="$journalPubDate"/>
<xsl:element name="targetLink">
<xsl:attribute name="xlink:href">targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])</xsl:attribute>
<xsl:attribute name="xlink:href" select="targets.xml#//descendant::subscriber[attribute::name='$subscriberNameFromDoc']"/> -->
</xsl:element>
</xsl:element>
</xsl:element>
</xsl:template>
</xsl:stylesheet>
我想使用$ initialOutput变量将第一个转换的结果提供给下一个。在第二个转换中，assetTargetTargetLookupRemoveDuplicates.xsl，我有以下代码：
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:saxon="http://saxon.sf.net/"
exclude-result-prefixes="xlink xs xsl saxon"
version="2.0">
<xsl:strip-space elements="*" />
<xsl:template match="/" mode="remove-duplicates">
<xsl:apply-templates select="journals" mode="remove-duplicates"/>
</xsl:template>
<xsl:template match="journals" mode="remove-duplicates">
<xsl:copy>
<xsl:for-each-group select="journal" group-by="@name">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:copy-of select="current-group()/target"/>
</xsl:copy>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
第二种转换不会将重复的日记转换成唯一的日记。整个过程的结果是日记帐重复的文档。结果再次是：
<?xml version="1.0" encoding="UTF-8"?>
<journals xmlns:xlink="http://www.w3.org/1999/xlink">
<journal name="00002030">
<target identifier="aries" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
<journal name="00000372">
<target identifier="aries" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
<journal name="00002030">
<target identifier="cas" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
<journal name="00000372">
<target identifier="cas" pubdate="01/01/2004">
<targetLink xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="targets.xml#xpointer(/descendant::subscriber[attribute::name='$subscriberNameFromDoc'])"/>
</target>
</journal>
</journals>
能否请您帮我找出第二个转换为何如此工作的原因？预先感谢您的帮助。
解决方法
我认为您需要重写
<xsl:template match="/" mode="package">
<xsl:result-document method="xml" omit-xml-declaration="no" indent="yes" encoding="UTF-8" href="lookup.xml">
<xsl:variable name="initialOutput">
<xsl:apply-templates mode="package"/>
</xsl:variable>
<xsl:apply-templates select="$initialOutput" mode="remove-duplicates"/>
</xsl:result-document>
</xsl:template>
为
<xsl:variable name="initialOutput">
<xsl:apply-templates mode="package"/>
</xsl:variable>
<xsl:template match="/">
<xsl:result-document method="xml" omit-xml-declaration="no" indent="yes" encoding="UTF-8" href="lookup.xml">
<xsl:apply-templates select="$initialOutput" mode="remove-duplicates"/>
</xsl:result-document>
</xsl:template>
感谢Martin的评论和帮助，我终于确定了解决方案。以下代码完成了我在问题中描述的内容：
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:saxon="http://saxon.sf.net/"
exclude-result-prefixes="xs xsl saxon xlink">
<xsl:strip-space elements="*" />
<xsl:output method="xml" omit-xml-declaration="no"
indent="yes" encoding="UTF-8" saxon:character-representation="entity" />
<xsl:include href="utilities.xsl" />
<xsl:variable name="inputFolderAndFile">
<xsl:call-template
name="getValuesBeforeAndAfterLastOccurance">
<xsl:with-param name="inputString"
select="string(base-uri(.))" />
<xsl:with-param name="char" select="'/'" />
</xsl:call-template>
</xsl:variable>
<xsl:variable name="inputFolderPath"
select="substring-before($inputFolderAndFile,'*')" />
<xsl:variable name="inputFile"
select="substring-after($inputFolderAndFile,'*')" />
<xsl:variable name="tokens"
select="tokenize($inputFile,'\.')" />
<xsl:variable name="baseFileName"
select="string-join($tokens[not(.=$tokens[last()])],'.')" />
<xsl:template match="@* | * | comment() | processing-instruction()">
<xsl:apply-templates select="@* | node()"/>
</xsl:template>
<xsl:template match="text()" >
<xsl:copy/>
</xsl:template>
<xsl:template match="/">
<xsl:variable name="initialOutput">
<xsl:element name="journals">
<xsl:namespace name="xlink" select="'http://www.w3.org/1999/xlink'"/>
<xsl:apply-templates/>
</xsl:element>
</xsl:variable>
<xsl:apply-templates select="$initialOutput" mode="remove-duplicates"/>
</xsl:template>
<xsl:template match="subscriber">
<xsl:variable name="subscriberName" select="document(concat($inputFolderPath,'/',@name,'_subscriptions.xml'))" />
<xsl:apply-templates select="$subscriberName" mode="journal-processing"/>
</xsl:template>
<xsl:template match="journal" mode="journal-processing">
<xsl:variable name="journalName" select="@name" />
<xsl:variable name="journalPubDate" select="issue/@pubdate" />
<xsl:variable name="subscriberNameFromDoc" select="substring-before(tokenize(base-uri(),'/')[last()],'_subscriptions')" />
<xsl:element name="journal">
<xsl:attribute name="name" select="$journalName"/>
<xsl:element name="target">
<xsl:attribute name="identifier" select="$subscriberNameFromDoc"/>
<xsl:attribute name="pubdate" select="$journalPubDate"/>
<xsl:element name="targetLink" namespace="http://www.w3.org/1999/xlink">
<xsl:variable name="apostrophe">'</xsl:variable>
<xsl:attribute name="xlink:href" select="concat('targets.xml','#','xpointer(/descendant::subscriber[attribute::name=',$apostrophe,$subscriberNameFromDoc,'])')"/>
</xsl:element>
</xsl:element>
</xsl:element>
</xsl:template>
<xsl:template match="/" mode="remove-duplicates">
<xsl:apply-templates select="journals" mode="remove-duplicates"/>
</xsl:template>
<xsl:template match="journals" mode="remove-duplicates">
<xsl:copy>
<xsl:for-each-group select="journal" group-by="@name">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:copy-of select="current-group()/target"/>
</xsl:copy>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>