匹配一个或多个子节点的 XSL 密钥

XSL key matching one or more child nodes

我有一个按书名结构的复杂 XML 文件。类似这样的东西,但有数百本书,有时每本书有很多作者。

<Book>
    <Title>Ken Lum</Title>
    <Author>
        <GivenName>Grant</GivenName>
        <Surname>Arnold</Surname>
    </Author>
</Book>
<Book>
    <Title>Shore, Forest and Beyond</Title>
    <Author>
        <GivenName>Ian M.</GivenName>
        <Surname>Thom</Surname>
    </Author>
    <Author>
        <GivenName>Grant</GivenName>
        <Surname>Arnold</Surname>
    </Author>
</Book>

我需要输出的是按字母顺序排列的作者列表,然后是他们编写的每本书的列表,也按字母顺序排列,例如:

Arnold, Grant — Ken Lum; Shore, Forest and Beyond

Thom, Ian M. — Shore, Forest and Beyond

我有一个代码版本工作得很好,但速度很慢,所以我正在尝试优化我的方法。我最近从这里的另一个用户那里了解到 Muenchian method 分组,我正在尝试应用它。

我现在特别关注的部分是获取每位作者的书名列表。这就是我现在拥有的:

<xsl:key name="books-by-author" match="Book"
         use="concat(Author/GivenName, Contributor/Surname)" />
…
<xsl:template match="Author">
    …
    <xsl:apply-templates mode="ByAuthor" select=
                                "key('books-by-author',
                                     concat(GivenName, Surname)
                                     )">
        <xsl:sort select="Title/TitleText"/>
    </xsl:apply-templates>
</template>

但这似乎只匹配作者列在第一位的书籍,例如:

Arnold, Grant — Ken Lum

Thom, Ian M. — Shore, Forest and Beyond

我认为 xsl:key 仅使用第一个 Author 元素,而不是检查每个作者。是否可以像这样检查每个 Author ?或者有更好的方法吗?

我建议你这样看:

XML

<Books>
    <Book>
        <Title>Ken Lum</Title>
        <Author>
            <GivenName>Grant</GivenName>
            <Surname>Arnold</Surname>
        </Author>
    </Book>
    <Book>
        <Title>Shore, Forest and Beyond</Title>
        <Author>
            <GivenName>Ian M.</GivenName>
            <Surname>Thom</Surname>
        </Author>
        <Author>
            <GivenName>Grant</GivenName>
            <Surname>Arnold</Surname>
        </Author>
    </Book>
</Books>

XSLT 1.0

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

<xsl:key name="author" match="Author" use="concat(Surname, ', ', GivenName)" />

<xsl:template match="/Books">   
    <Authors>
        <!-- for each unique author -->
        <xsl:for-each select="Book/Author[count(. | key('author', concat(Surname, ', ', GivenName))[1]) = 1]">
            <xsl:sort select="Surname"/>
            <xsl:sort select="GivenName"/>
            <Author>
                <!-- author's details-->
                <xsl:copy-of select="Surname | GivenName"/>
                <!-- list author's books -->
                <Books>
                    <xsl:for-each select="key('author', concat(Surname, ', ', GivenName))/parent::Book">
                        <xsl:sort select="Title"/>
                        <xsl:copy-of select="Title"/>
                    </xsl:for-each> 
                </Books>
            </Author>
        </xsl:for-each>
    </Authors>
</xsl:template>

</xsl:stylesheet>

结果

<?xml version="1.0" encoding="UTF-8"?>
<Authors>
  <Author>
    <GivenName>Grant</GivenName>
    <Surname>Arnold</Surname>
    <Books>
      <Title>Ken Lum</Title>
      <Title>Shore, Forest and Beyond</Title>
    </Books>
  </Author>
  <Author>
    <GivenName>Ian M.</GivenName>
    <Surname>Thom</Surname>
    <Books>
      <Title>Shore, Forest and Beyond</Title>
    </Books>
  </Author>
</Authors>