一个xslt转换的结果输入到另一个

分类：编程问答

如何解决一个xslt转换的结果输入到另一个

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="success1.from@mail.com"/>
                    <to address="success1.to@mail.com"/>
                </mail>
            </notify-success>
            <notify-failure>
                <mail mailhost="smtprelayptc1.wkglobal.net" mailport="25" subject="MRCS-PS HEADER UPDATE - PAP">
                    <from address="failure1.from@mail.com"/>
                    <to address="failure1.to@mail.com"/>
                </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="success2.from@mail.com"/>
                    <to address="success2.to@mail.com"/>
                </mail>
            </notify-success>
            <notify-failure>
                <mail mailhost="smtprelayptc1.wkglobal.net" mailport="25" subject="MRCS-PS HEADER UPDATE - PAP">
                    <from address="failure2.from@mail.com"/>
                    <to address="failure2.to@mail.com"/>
                </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>

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