XPath:查找祖先中元素的下一个出现

时间:2019-05-31 14:31:57

标签: xpath schematron

我正在尝试在sec-type ='reading'的部分中找到下一个实例。

XML示例:

<?xml version="1.0" encoding="US-ASCII"?>
<book>
    <sec sec-type="reading">
        <title>Section 1</title>
        <p>Sample <bold>Bold</bold>Text <fn><label>1</label></fn> Some more text</p>
        <!-- more variations of stuff at various levels -->
        <sec>
            <title>Section 1.1</title>
            <p>Another paragraph with a footnote <fn><label>2</label></fn></p>
        </sec>
        <sec>
            <title>Section 1.2</title>
            <p>Another paragraph with a footnote <fn><label>3</label></fn></p>
        </sec>
    </sec>

    <sec sec-type="reading">
        <title>Section 2</title>
        <p>Sample <bold>Bold</bold>Text <fn><label>6</label></fn> Some more text</p>
        <!-- more variations of stuff at various levels -->
        <sec>
            <title>Section 2.1</title>
            <p>Another paragraph with a footnote <fn><label>8</label></fn></p>
        </sec>
        <sec>
            <title>Section 2.2</title>
            <p>Another paragraph with a footnote <fn><label>9</label></fn></p>
        </sec>
    </sec>
</book>

目的是查看FN标签是否在部分中按顺序排序。我在第二部分用6-9编号,以使其更容易查看。

这就是我想要的:

Footnote 1 [Next: 2]
Footnote 2 [Next: 3]
Footnote 3 [Next: ]
Footnote 6 [Next: 8]
Footnote 8 [Next: 9]
Footnote 9 [Next: ]

最终目标是为Footnote 6 [Next: 8]返回警告

这是我到目前为止所掌握的schematron。这给了我

Footnote 1 [Next: 2]
Footnote 2 [Next: 3]
**Footnote 3 [Next: 6]**
Footnote 6 [Next: 8]
Footnote 8 [Next: 9]
Footnote 9 [Next: ]

找到脚注的下一个实例。但是,我不希望它横断面-因此Footnote 3 [Next: 6]是错误的。

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://purl.oclc.org/dsdl/schematron"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    queryBinding="xslt2"  >

  <!--check if footnotes are sequential within a reading -->
  <pattern id="footnote-sequential"> 
    <rule context="fn"> 
        <let name="next" value="following::fn[1]/label/text()"/>

        <assert test="number(label/text()) > 40">
        Footnote <value-of select='label'/> 
          [Next: <value-of select="$next"/>]
      </assert>
    </rule> 
  </pattern>
</schema>

注意:断言中的number(label/text()) > 40可以立即捕获所有内容。最终将与number(current)+1 != number(next)

相似

我得到的最接近的是ancestor::sec[@sec-type='reading']//following::fn[1]/label/text()-但这会使“下一个”失去意义,并给我这样奇怪的结果:

    Footnote 1 [Next: 1236]
    Footnote 2 [Next: 1236]
    Footnote 3 [Next: 1236]
    Footnote 6 [Next: 689]
    Footnote 8 [Next: 689]
    Footnote 9 [Next: 689]

1 个答案:

答案 0 :(得分:2)

您需要intersect

[编辑]

$next设置为fn元素,而不是标签文本:

<let name="next" value="following::fn[1]"/>

[/ EDIT]

转到当前部分并记下本部分的所有脚注:

<let name="sect-fns" value="ancestor::sec[@sec-type='reading']//fn" />

$next$sect-fns处相交:

<let name="next" value="$next intersect $sect-fns" />

检查$next是否为空或其标签为number(./label) + 1

<assert test="not($next) or number(./label) + 1 = number($next/label)">