格式化表列以忽略重复项XSLT-1.0

我希望有人能用XSLT1.0中的概念为我指明正确的方向。我正在生成一个PDF，因此代码有点长，我认为只包含相关的位更合适

我有类似于以下框架的XML（完整的XML有几十行，每行包含的不仅仅是生产者和发布者）：

以这种方式等等

在我的XSLT中产生这种情况的代码的主要部分是：

<xsl:template match ="table">
    <fo:table>
        <fo:table-body  font-size="10pt"
                        font-family="sans-serif"
                        line-height="10pt"
                        space-after.optimum="3pt">
            <xsl:for-each select="row">
                <fo:table-row>
                    <fo:table-cell  width="2.125in"
                                    height="0.2in">
                        <xsl:choose>
                        <xsl:apply-templates select="PRODUCER"/>
                        </xsl:choose>
                    </fo:table-cell>
                    <fo:table-cell  width="3.25in"
                                    height="0.2in">
                        <xsl:apply-templates select="PUBLICATION_CODE_-_NAME"/>
                    </fo:table-cell>
                </fo:table-row>
            </xsl:for-each>
        </fo:table-body>
    </fo:table>
</xsl:template>

<xsl:template match="PRODUCER">
    <fo:block>
            <xsl:value-of select="@value"/>
    </fo:block>
</xsl:template>

<xsl:template match="PUBLICATION_CODE_-_NAME">
    <fo:block>
        <xsl:value-of select="@value"/>
    </fo:block>
</xsl:template>

我尝试这样做的方式是在XSLT的这一部分中

<xsl:template match="PRODUCER">
    <fo:block>
            <xsl:value-of select="@value"/>
    </fo:block>
</xsl:template>

在这一点上，据我所知，上下文节点是生产者。因此，为了比较前几行中的生产者值，我需要使用../previous sibling的效果，以便找到最后一行的previous sibling（而不是PRODUCER）。此外，信息已经由制作人订购，因此我只需要查看前面最接近的兄弟姐妹，而不是所有兄弟姐妹

我试图使用以下代码来解决此问题：

<xsl:template match="PRODUCER">
    <fo:block>
        <xsl:if test="not(../preceding-sibling::PRODUCER/@value = self/@value>
            <xsl:value-of select="@value"/>
        </xsl:if>
    </fo:block>
</xsl:template>

它可以通过分组来完成，也可以通过前面的兄弟姐妹来完成。我注意到你说的是“几十”。。。我不会担心使用分组。我用2000行运行了这个示例，执行时间为2.3秒（使用Saxon在氧气中进行调试），0.1秒不进行调试。几十个需要几分之一秒的时间。我在这里扩展了您的示例，包括第一次出现的测试，该测试之前没有兄弟姐妹。你也可以结合一些东西，但我留下了这个，这样你可以看到不同的决定：

示例XML：

<root>
    <table>
        <row>
            <PRODUCER>1</PRODUCER>
            <PUBLICATION>A</PUBLICATION>
        </row>
        <row>
            <PRODUCER>1</PRODUCER>
            <PUBLICATION>B</PUBLICATION>
        </row>
        <row>
            <PRODUCER>1</PRODUCER>
            <PUBLICATION>C</PUBLICATION>
        </row>
        <row>
            <PRODUCER>2</PRODUCER>
            <PUBLICATION>B</PUBLICATION>
        </row>
        <row>
            <PRODUCER>2</PRODUCER>
            <PUBLICATION>C</PUBLICATION>
        </row>
        <row>
            <PRODUCER>3</PRODUCER>
            <PUBLICATION>A</PUBLICATION>
        </row>
        <row>
            <PRODUCER>4</PRODUCER>
            <PUBLICATION>B</PUBLICATION>
        </row>
    </table>
</root>


1.
A.
1.
B
1.
C
2.
B
2.
C
3.
A.
4.
B

XSL，用于测试前一个同级，将其放入一个变量中进行处理，并仅选择前一个变量[1]：

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format"
    version="1.0">
    <xsl:output indent="yes"/>
    <xsl:template match ="table">
        <fo:table>
            <fo:table-body  font-size="10pt"
                font-family="sans-serif"
                line-height="10pt"
                space-after.optimum="3pt">
                <xsl:for-each select="row">
                    <fo:table-row>
                        <fo:table-cell  width="2.125in"
                            height="0.2in">
                                <xsl:apply-templates select="PRODUCER"/>

                        </fo:table-cell>
                        <fo:table-cell  width="3.25in"
                            height="0.2in">
                            <xsl:apply-templates select="PUBLICATION"/>
                        </fo:table-cell>
                    </fo:table-row>
                </xsl:for-each>
            </fo:table-body>
        </fo:table>
    </xsl:template>

        <xsl:template match="PRODUCER">
    <fo:block>
        <!-- Get the previous row element to the one I am in -->
        <xsl:variable name="test" select="parent::row/preceding-sibling::row[1]"/>
        <xsl:choose>
            <!-- First test, do we have a row? -->
            <xsl:when test="$test">
                <!-- Yes we have a previous row -->
                <xsl:choose>
                    <!-- Next, is the previous row's PRODUCER text the same as ours? -->
                    <xsl:when test="$test/PRODUCER/text() = text()">
                        <!-- It is, output nothing -->
                        <fo:leader/>
                    </xsl:when>
                    <xsl:otherwise>
                        <!-- It is not, so output it -->
                        <xsl:value-of select="concat('Producer ',.)"/>
                    </xsl:otherwise>
                </xsl:choose>
            </xsl:when>
            <!-- We are the first row (no previous one) so output it  -->
            <xsl:otherwise>
                <xsl:value-of select="concat('Producer ',.)"/>
            </xsl:otherwise>
        </xsl:choose>
    </fo:block>
</xsl:template>

    <xsl:template match="PUBLICATION">
        <fo:block>
            <xsl:value-of select="concat('Publication ',.)"/>
        </fo:block>
    </xsl:template>
</xsl:stylesheet>



输出：

<fo:table xmlns:fo="http://www.w3.org/1999/XSL/Format">
<fo:table-body font-size="10pt" font-family="sans-serif" line-height="10pt" space-after.optimum="3pt">
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>Producer 1</fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication A</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>
           <fo:leader/>
        </fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication B</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>
           <fo:leader/>
        </fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication C</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>Producer 2</fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication B</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>
           <fo:leader/>
        </fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication C</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>Producer 3</fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication A</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>Producer 4</fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication B</fo:block>
     </fo:table-cell>
  </fo:table-row>
</fo:table-body>
</fo:table>


制作人1
出版物A
出版物B
出版物C
制作人2
出版物B
出版物C
制片人3
出版物A
制片人4
出版物B
这是一个分组问题。请参阅：这里还有很多这样的例子。XSLT1.0中的分组技巧是必要的。这门语言很有能力做到这一点，但它不是直截了当的，在语言中也找不到分组。经过几次努力，你将成为一名专家！谢谢你的意见。我一直在回顾明钦方法。我本周刚开始使用这项技术，发现学习曲线有点陡峭。我希望在完全理解我正在生成的这份报告之后，能够避免再问更多的问题。“我用2000行运行了这个示例，执行时间为2.3秒（在使用Saxon的氧气调试模式下）。”不同的处理器，不同的统计数据。遵循良好的实践是值得的。是的，对于2250行saxon6，没有调试，时间是0.1秒。Xalan为5秒，NET2.0为1.3秒。当然，2250比几十大。非常感谢凯文，这正是我想要的。
<root>
    <table>
        <row>
            <PRODUCER>1</PRODUCER>
            <PUBLICATION>A</PUBLICATION>
        </row>
        <row>
            <PRODUCER>1</PRODUCER>
            <PUBLICATION>B</PUBLICATION>
        </row>
        <row>
            <PRODUCER>1</PRODUCER>
            <PUBLICATION>C</PUBLICATION>
        </row>
        <row>
            <PRODUCER>2</PRODUCER>
            <PUBLICATION>B</PUBLICATION>
        </row>
        <row>
            <PRODUCER>2</PRODUCER>
            <PUBLICATION>C</PUBLICATION>
        </row>
        <row>
            <PRODUCER>3</PRODUCER>
            <PUBLICATION>A</PUBLICATION>
        </row>
        <row>
            <PRODUCER>4</PRODUCER>
            <PUBLICATION>B</PUBLICATION>
        </row>
    </table>
</root>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format"
    version="1.0">
    <xsl:output indent="yes"/>
    <xsl:template match ="table">
        <fo:table>
            <fo:table-body  font-size="10pt"
                font-family="sans-serif"
                line-height="10pt"
                space-after.optimum="3pt">
                <xsl:for-each select="row">
                    <fo:table-row>
                        <fo:table-cell  width="2.125in"
                            height="0.2in">
                                <xsl:apply-templates select="PRODUCER"/>

                        </fo:table-cell>
                        <fo:table-cell  width="3.25in"
                            height="0.2in">
                            <xsl:apply-templates select="PUBLICATION"/>
                        </fo:table-cell>
                    </fo:table-row>
                </xsl:for-each>
            </fo:table-body>
        </fo:table>
    </xsl:template>

        <xsl:template match="PRODUCER">
    <fo:block>
        <!-- Get the previous row element to the one I am in -->
        <xsl:variable name="test" select="parent::row/preceding-sibling::row[1]"/>
        <xsl:choose>
            <!-- First test, do we have a row? -->
            <xsl:when test="$test">
                <!-- Yes we have a previous row -->
                <xsl:choose>
                    <!-- Next, is the previous row's PRODUCER text the same as ours? -->
                    <xsl:when test="$test/PRODUCER/text() = text()">
                        <!-- It is, output nothing -->
                        <fo:leader/>
                    </xsl:when>
                    <xsl:otherwise>
                        <!-- It is not, so output it -->
                        <xsl:value-of select="concat('Producer ',.)"/>
                    </xsl:otherwise>
                </xsl:choose>
            </xsl:when>
            <!-- We are the first row (no previous one) so output it  -->
            <xsl:otherwise>
                <xsl:value-of select="concat('Producer ',.)"/>
            </xsl:otherwise>
        </xsl:choose>
    </fo:block>
</xsl:template>

    <xsl:template match="PUBLICATION">
        <fo:block>
            <xsl:value-of select="concat('Publication ',.)"/>
        </fo:block>
    </xsl:template>
</xsl:stylesheet>

<fo:table xmlns:fo="http://www.w3.org/1999/XSL/Format">
<fo:table-body font-size="10pt" font-family="sans-serif" line-height="10pt" space-after.optimum="3pt">
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>Producer 1</fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication A</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>
           <fo:leader/>
        </fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication B</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>
           <fo:leader/>
        </fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication C</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>Producer 2</fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication B</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>
           <fo:leader/>
        </fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication C</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>Producer 3</fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication A</fo:block>
     </fo:table-cell>
  </fo:table-row>
  <fo:table-row>
     <fo:table-cell width="2.125in" height="0.2in">
        <fo:block>Producer 4</fo:block>
     </fo:table-cell>
     <fo:table-cell width="3.25in" height="0.2in">
        <fo:block>Publication B</fo:block>
     </fo:table-cell>
  </fo:table-row>
</fo:table-body>
</fo:table>