XSLT Muenchian 分组在组内创建密钥 [英] XSLT Muenchian grouping create key inside group
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问题描述
我的目标是首先按<进行分组.ColumnBreak>.
My goal is to group the nodes first by <RowBreak>, then in each <RowBreak> group, I want to group by <ColumnBreak>.
这是我的 XML.
<?xml version="1.0" encoding="utf-8" ?>
<Tree>
<Item>
<Label>Item 1</Label>
</Item>
<Item>
<Label>Item 2</Label>
</Item>
<ColumnBreak />
<Item>
<Label>Item 3</Label>
</Item>
<Item>
<Label>Item 4</Label>
</Item>
<Item>
<Label>Item 5</Label>
</Item>
<RowBreak />
<Item>
<Label>Item 6</Label>
</Item>
<Item>
<Label>Item 7</Label>
</Item>
<ColumnBreak />
<Item>
<Label>Item 8</Label>
</Item>
<RowBreak />
<Item>
<Label>Item 9</Label>
</Item>
<Item>
<Label>Item 10</Label>
</Item>
</Tree>
输出应该是:
Item 1 Item 3
Item 2 Item 4
Item 5
Item 6 Item 8
Item 7
Item 9
Item 10
我目前的 XSLT 是这样的:
My current XSLT is like this:
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="html" indent="yes"/>
<xsl:key name="rowGroups" match="Tree/*[not(self::RowBreak)]" use="count(preceding-sibling::RowBreak)" />
<xsl:template match="Tree">
<xsl:variable name="rowGroupings" select="*[not(self::RowBreak)][generate-id() = generate-id(key('rowGroups', count(preceding-sibling::RowBreak))[1])]" />
<xsl:variable name="position" select="position()" />
<table>
<xsl:for-each select="$rowGroupings">
<xsl:variable name="rowId" select="generate-id()"/>
<xsl:variable name="colGroupings" select="*[not(self::ColumnBreak)][generate-id()=$rowId][1]" />
<tr>
<xsl:for-each select="$colGroupings">
<!--Do logic here to group by ColumnBreak-->
</xsl:for-each>
</tr>
</xsl:for-each>
</table>
</xsl:template>
</xsl:stylesheet>
但是，我在提取每个
However, I'm getting problem with extracting the <ColumnBreak> groups in every <RowBreak> (see colGroupings variable). I want to create a <key> for every <RowBreak> in the loop (similar to rowGroups), but as per my understanding of <xsl:key> element, it has to be declared top-level and the match should work on actual nodes, not on variables.
推荐答案
这是我第一遍要做的:
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/Tree">
<cells>
<xsl:apply-templates select="Item[1]" mode="sibling">
<xsl:with-param name="row" select="1"/>
<xsl:with-param name="col" select="1"/>
</xsl:apply-templates>
</cells>
</xsl:template>
<xsl:template match="Item" mode="sibling">
<xsl:param name="row"/>
<xsl:param name="col"/>
<cell row="{$row}" col="{$col}">
<xsl:value-of select="Label"/>
</cell>
<xsl:apply-templates select="following-sibling::*[1]" mode="sibling">
<xsl:with-param name="row" select="$row"/>
<xsl:with-param name="col" select="$col"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="ColumnBreak" mode="sibling">
<xsl:param name="row"/>
<xsl:param name="col"/>
<xsl:apply-templates select="following-sibling::*[1]" mode="sibling">
<xsl:with-param name="row" select="$row"/>
<xsl:with-param name="col" select="$col + 1"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="RowBreak" mode="sibling">
<xsl:param name="row"/>
<xsl:param name="col"/>
<xsl:apply-templates select="following-sibling::*[1]" mode="sibling">
<xsl:with-param name="row" select="$row + 1"/>
<xsl:with-param name="col" select="1"/>
</xsl:apply-templates>
</xsl:template>
</xsl:stylesheet>
应用于您的示例输入，这将产生:
Applied to your example input, this would produce:
结果
<?xml version="1.0" encoding="UTF-8"?>
<cells>
<cell row="1" col="1">Item 1</cell>
<cell row="1" col="1">Item 2</cell>
<cell row="1" col="2">Item 3</cell>
<cell row="1" col="2">Item 4</cell>
<cell row="1" col="2">Item 5</cell>
<cell row="2" col="1">Item 6</cell>
<cell row="2" col="1">Item 7</cell>
<cell row="2" col="2">Item 8</cell>
<cell row="3" col="1">Item 9</cell>
<cell row="3" col="1">Item 10</cell>
</cells>
这是可以实际使用的东西.
which is something that can be actually worked with.
这是一个完整的样式表，它分两遍处理输入:
Here's a complete stylesheet that processes the input in two passes:
- 第一遍使用同级递归，如上所述；
- 第二遍按行和列进行 Muenchian 分组，以生成原始文档描述的表格:
XSLT 1.0(带有 EXSLT node-set() 扩展函数)
XSLT 1.0 (with EXSLT node-set() extension function)
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl">
<xsl:strip-space elements="*"/>
<xsl:output method="xml" version="1.0" encoding="utf-8" indent="yes"/>
<xsl:key name="cell-by-row" match="cell" use="@row" />
<xsl:key name="cell-by-col" match="cell" use="concat(@row, '|', @col)" />
<xsl:template match="/Tree">
<!-- first-pass -->
<xsl:variable name="cells">
<xsl:apply-templates select="Item[1]" mode="sibling">
<xsl:with-param name="row" select="1"/>
<xsl:with-param name="col" select="1"/>
</xsl:apply-templates>
</xsl:variable>
<!-- output -->
<table border = "1">
<!-- for each distinct row -->
<xsl:for-each select="exsl:node-set($cells)/cell[count(. | key('cell-by-row', @row)[1]) = 1]">
<tr>
<!-- for each distinct cell in the current row -->
<xsl:for-each select="key('cell-by-row', @row)[count(. | key('cell-by-col', concat(@row, '|', @col))[1]) = 1]">
<td>
<!-- get the values in the current cell -->
<xsl:for-each select="key('cell-by-col', concat(@row, '|', @col))">
<xsl:value-of select="."/>
<br/>
</xsl:for-each>
</td>
</xsl:for-each>
</tr>
</xsl:for-each>
</table>
</xsl:template>
<xsl:template match="Item" mode="sibling">
<xsl:param name="row"/>
<xsl:param name="col"/>
<cell row="{$row}" col="{$col}">
<xsl:value-of select="Label"/>
</cell>
<xsl:apply-templates select="following-sibling::*[1]" mode="sibling">
<xsl:with-param name="row" select="$row"/>
<xsl:with-param name="col" select="$col"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="ColumnBreak" mode="sibling">
<xsl:param name="row"/>
<xsl:param name="col"/>
<xsl:apply-templates select="following-sibling::*[1]" mode="sibling">
<xsl:with-param name="row" select="$row"/>
<xsl:with-param name="col" select="$col + 1"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="RowBreak" mode="sibling">
<xsl:param name="row"/>
<xsl:param name="col"/>
<xsl:apply-templates select="following-sibling::*[1]" mode="sibling">
<xsl:with-param name="row" select="$row + 1"/>
<xsl:with-param name="col" select="1"/>
</xsl:apply-templates>
</xsl:template>
</xsl:stylesheet>
结果
<?xml version="1.0" encoding="utf-8"?>
<table border="1">
<tr>
<td>Item 1<br/>Item 2<br/></td>
<td>Item 3<br/>Item 4<br/>Item 5<br/></td>
</tr>
<tr>
<td>Item 6<br/>Item 7<br/></td>
<td>Item 8<br/></td>
</tr>
<tr>
<td>Item 9<br/>Item 10<br/></td>
</tr>
</table>
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