需要帮助嵌套兄弟姐妹 [英] Need help nesting siblings
问题描述
我想做一个能够根据属性值(outline-level
)嵌套一组同级元素的转换.
I want to make a transformation that is able to nest a set of sibling elements depending on value of attribute (outline-level
).
这是输入的xml文件:
This is the input xml file:
<text>
<para style="Heading 1" outline-level="1">Level 1</para>
<para xml:lang="en" style="Directive">Concept: 1</para>
<para xml:lang="en" style="Heading 2" outline-level="2">Level 2</para>
<para xml:lang="en" style="Directive">Concept: 2</para>
<para xml:lang="en" style="Heading 2" outline-level="2">Level 2</para>
<para xml:lang="en" style="Directive">Concept: 3</para>
<para xml:lang="en" style="Heading 3" outline-level="3">Level 3</para>
<para xml:lang="en" style="Directive">Concept: 4</para>
<para xml:lang="en" style="Heading 3" outline-level="3">Level 3</para>
<para xml:lang="en" style="Directive">Concept: 5</para>
<para xml:lang="en" style="Heading 1" outline-level="1">Level 1</para>
<para xml:lang="en" style="Directive">Concept: 6</para>
<para xml:lang="en" style="Heading 2" outline-level="2">Level 2</para>
<para xml:lang="en" style="Directive">Concept: 7</para>
<para xml:lang="en" style="Heading 3" outline-level="3">Level 3</para>
<para xml:lang="en" style="Directive">Concept: 8</para>
</text>
这就是我想要实现的:
<root>
<para id="Concept: 1">Level 1
<para id="Concept: 2">Level 2</para>
<para id="Concept: 3">Level 2
<para id="Concept: 4">Level 3</para>
<para id="Concept: 5">Level 3</para>
</para>
</para>
<para id="Concept: 6">Level1
<para id="Concept: 7">Level 2
<para id="Concept: 8"/>
</para>
</para>
</root>
嵌套级别必须由 @outline-level
的值决定.数字越大,元素嵌套越深.
The nesting level have to be determined by the value of @outline-level
. The bigger is that number the deeper is the element nested.
任何想法将不胜感激.
推荐答案
试试这个方法?
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:strip-space elements="*"/>
<xsl:key name="child-paras" match="para" use="generate-id(preceding-sibling::para[@outline-level = current()/@outline-level - 1][1])" />
<!-- identity transform -->
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="/text">
<root>
<xsl:apply-templates select="para[@outline-level=1]"/>
</root>
</xsl:template>
<xsl:template match="para">
<para id="{following-sibling::para[1]}">
<xsl:value-of select="." />
<xsl:apply-templates select="key('child-paras', generate-id())"/>
</para>
</xsl:template>
</xsl:stylesheet>
当应用于您的示例输入时,结果将是:
When applied to your example input, the result will be:
<?xml version="1.0" encoding="UTF-8"?>
<root>
<para id="Concept: 1">Level 1<para id="Concept: 2">Level 2</para>
<para id="Concept: 3">Level 2<para id="Concept: 4">Level 3</para>
<para id="Concept: 5">Level 3</para>
</para>
</para>
<para id="Concept: 6">Level 1<para id="Concept: 7">Level 2<para id="Concept: 8">Level 3</para>
</para>
</para>
</root>
其中(除了缩进差异)与您预期的输出相同 - 除了最后一个 para
其中 id="Concept: 8"
包含文本节点 Level 3"
- 我认为这是正确的.
which (other than differences in indenting) is identical to your expected output - except that the last para
where id="Concept: 8"
contains the text node "Level 3"
- which I believe is correct.
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