XSLT 1.0多个密钥交叉引用和合并

时间：2015-10-27 04:49:30

标签： xml xslt xslt-1.0 xslkey

感谢您抽出宝贵时间来查看我的问题。

我有一个输入结构（下图），其中每一行代表从一个位置项到另一个位置项的移动。因此，每一行都有一个位置和一个位置。

目标是嵌套的xml，其中location对象具有一些标题和项级别信息。我需要从所有行中的位置选择distint并映射其项目级别详细信息。

输入示例和所需的转换输出。

我有一个类似于

的平面数据库提取xml 
<Data>
<row>
    <Movement>Home to Work</Movement>
    <COMP_ID_F>HID001</COMP_ID_F>
    <ITEM_ID_F>1</ITEM_ID_F>
    <FIELDS_F> More home related data  </FIELDS_F>
    <COMP_ID_T>WID001</COMP_ID_T>
    <ITEM_ID_T>2</ITEM_ID_T>
    <FIELDS_T> More work related data</FIELDS_T>
</row>
<row>
    <Movement>Home to Work</Movement>
    <COMP_ID_F>HID001</COMP_ID_F>
    <ITEM_ID_F>1</ITEM_ID_F>
    <FIELDS_F> More home related data  </FIELDS_F>
    <COMP_ID_T>WID001</COMP_ID_T>
    <ITEM_ID_T>2</ITEM_ID_T>
    <FIELDS_T> More work related data</FIELDS_T>
</row>
<row>
    <Movement>Home to Work</Movement>
    <COMP_ID_F>HID001</COMP_ID_F>
    <ITEM_ID_F>1</ITEM_ID_F>
    <FIELDS_F> More home related data  </FIELDS_F>
    <COMP_ID_T>WID001</COMP_ID_T>
    <ITEM_ID_T>3</ITEM_ID_T>
    <FIELDS_T> More work related data</FIELDS_T>
</row>
<row>
    <Movement>Home to Work</Movement>
    <COMP_ID_F>HID001</COMP_ID_F>
    <ITEM_ID_F>2</ITEM_ID_F>
    <FIELDS_F> More home related data  </FIELDS_F>
    <COMP_ID_T>WID001</COMP_ID_T>
    <ITEM_ID_T>4</ITEM_ID_T>
    <FIELDS_T> More work related data</FIELDS_T>
</row>
<row>
    <Movement>Home to Work</Movement>
    <COMP_ID_F>HID002</COMP_ID_F>
    <ITEM_ID_F>1</ITEM_ID_F>
    <FIELDS_F> More home related data  </FIELDS_F>
    <COMP_ID_T>WID001</COMP_ID_T>
    <ITEM_ID_T>5</ITEM_ID_T>
    <FIELDS_T> More work related data</FIELDS_T>
</row>
<row>
    <Movement>Home to Work</Movement>
    <COMP_ID_F>HID002</COMP_ID_F>
    <ITEM_ID_F>2</ITEM_ID_F>
    <FIELDS_F> More home related data  </FIELDS_F>
    <COMP_ID_T>WID002</COMP_ID_T>
    <ITEM_ID_T>1</ITEM_ID_T>
    <FIELDS_T> More work related data</FIELDS_T>
</row>
</Data>

转换后的输出需要

 <Target>
<Events>
    <Movement>Home to Work</Movement>
    <Movement>Home to Work</Movement>
    <Movement>Home to Work</Movement>
    <Movement>Home to Work</Movement>
    <Movement>Home to Work</Movement>
    <Movement>Home to Work</Movement>
</Events>
<Locations>
    <Home>
        <id>HID001</id>
        <item>
            <id>1</id>
        </item>
        <item>
            <id>2</id>
        </item>
    </Home> 
    <Home>
        <id>HID002</id>
        <item>
            <id>1</id>
        </item>
        <item>
            <id>2</id>
        </item>
    </Home> 
    <Work>
        <id>WID001</id>
        <item>
            <id>1</id>
        </item>
        <item>
            <id>2</id>
        </item>
        <item>
            <id>3</id>
        </item>
        <item>
            <id>4</id>
        </item>
        <item>
            <id>5</id>
        </item>
    </Work>
    <Work>
        <id>WID002</id>
        <item>
            <id>1</id>
        </item>
    </Work>
</Locations>
</Target>

现在，我已经尝试了许多使用Keys并生成id的选项。所以，请看看我指出我出错的地方。或者，如果有更好的方法来实现此输出。

我创建了4个键

<xsl:key name="fcreg" match="row" use="COMP_ID_F"/>
<xsl:key name="fcireg" match="row" use="ITEM_ID_F"/>
<xsl:key name="tcreg" match="row" use="COMP_ID_T"/>
<xsl:key name="tcireg" match="row" use="ITEM_ID_T"/>

我的XSLT执行以下逻辑

<Target>
<!--transform all events-->
<Events>
    <xsl:for-each select="Data/row">
        <!-- get movement-->
    </xsl:for-each>
</Events>

<!--transform all from locations-->
<xsl:for-each select="Data/row[generate-id() = generate-id(key('fcreg',COMP_ID_F)[1])]">
    <xsl:for-each select="key('fcreg',COMP_ID_F)[generate-id() = generate-id(key('fcireg', ITEM_ID_F)[COMP_ID_F=current()/COMP_ID_F][1])]">
        <xsl:variable name="items" select="key('fcreg', COMP_ID_F)[ITEM_ID_F = current()/ITEM_ID_F]"/>
        <home>
            <xsl:value-of select="COMP_ID_F"/>
            <xsl:for-each select="$items">
                <item>
                    <id>
                        <xsl:value-of select="ITEM_ID_F"/>
                    </id>
                </item>
            </xsl:for-each>
        </home>
    </xsl:for-each>
</xsl:for-each>


<!--transform all to locations-->
<xsl:for-each select="Data/row[generate-id() = generate-id(key('tcreg',COMP_ID_T)[1])]">
    <xsl:for-each select="key('tcreg',COMP_ID_T)[generate-id() = generate-id(key('tcireg', ITEM_ID_T)[COMP_ID_T=current()/COMP_ID_T][1])]">
        <xsl:variable name="items" select="key('tcreg', COMP_ID_T)[ITEM_ID_T = current()/ITEM_ID_T]"/>
        <work>
            <xsl:value-of select="COMP_ID_T"/>
            <xsl:for-each select="$items">
                <item>
                    <id>
                        <xsl:value-of select="ITEM_ID_T"/>
                    </id>
                </item>
            </xsl:for-each>
        </work>
    </xsl:for-each>
</xsl:for-each>
</Target>

我哪里错了？非常感谢任何帮助。

提前致谢。

1 个答案:

答案 0 :(得分：1)

看起来您正在尝试获取不同的COMP_ID_F元素，并且对于每个不同的值，您希望列出与其关联的所有不同ITEM_ID_F。

您的fcreg密钥很好，但因为ITEM_ID_F项取决于COMP_ID_F的值，您需要fcireg的连锁密钥

<xsl:key name="fcireg" match="row" use="concat(COMP_ID_F, '|', ITEM_ID_F)"/>

所以，你可以像以前一样选择ITEM_ID_F ...... 

<xsl:for-each select="Data/row[generate-id() = generate-id(key('fcreg',COMP_ID_F)[1])]">

但在此范围内，您可以为当前ITEM_ID_F元素选择不同的COMP_ID_F项。这是这样做的：

<xsl:for-each select="Data/row[generate-id() = generate-id(key('fcreg',COMP_ID_F)[1])]">
    <home>
        <id><xsl:value-of select="COMP_ID_F" /></id>
        <xsl:for-each select="key('fcreg',COMP_ID_F)[generate-id() = generate-id(key('fcireg',concat(COMP_ID_F, '|', ITEM_ID_F))[1])]">
            <item>
                <id>
                    <xsl:value-of select="ITEM_ID_F"/>
                </id>
            </item>
        </xsl:for-each>
    </home>
</xsl:for-each>

对于“T”元素，你会有类似的元素

试试这个XSLT 

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
    <xsl:output method="xml" encoding="UTF-8" indent="yes" />

    <xsl:key name="fcreg" match="row" use="COMP_ID_F"/>
    <xsl:key name="fcireg" match="row" use="concat(COMP_ID_F, '|', ITEM_ID_F)"/>
    <xsl:key name="tcreg" match="row" use="COMP_ID_T"/>
    <xsl:key name="tcireg" match="row" use="concat(COMP_ID_T, '|', ITEM_ID_T)"/>

    <xsl:template match="/">
        <Target>
            <Events>
                <xsl:copy-of select="Data/row/Movement" />
            </Events>

        <xsl:for-each select="Data/row[generate-id() = generate-id(key('fcreg',COMP_ID_F)[1])]">
            <Home>
                <id><xsl:value-of select="COMP_ID_F" /></id>
                <xsl:for-each select="key('fcreg',COMP_ID_F)[generate-id() = generate-id(key('fcireg',concat(COMP_ID_F, '|', ITEM_ID_F))[1])]">
                    <item>
                        <id>
                            <xsl:value-of select="ITEM_ID_F"/>
                        </id>
                    </item>
                </xsl:for-each>
            </Home>
        </xsl:for-each>

        <xsl:for-each select="Data/row[generate-id() = generate-id(key('tcreg',COMP_ID_T)[1])]">
            <Work>
                <id><xsl:value-of select="COMP_ID_T" /></id>
                <xsl:for-each select="key('tcreg',COMP_ID_T)[generate-id() = generate-id(key('tcireg',concat(COMP_ID_T, '|', ITEM_ID_T))[1])]">
                    <item>
                        <id>
                            <xsl:value-of select="ITEM_ID_T"/>
                        </id>
                    </item>
                </xsl:for-each>
            </Work>
        </xsl:for-each>
        </Target>
    </xsl:template>
</xsl:stylesheet>
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