这段XSLT代码是否荒谬?
我正在尝试修改其他人编写的xsl表。但现在我只是想了解。。。 读到这篇文章我真的很惊讶:这段XSLT代码是否荒谬?,xslt,Xslt,我正在尝试修改其他人编写的xsl表。但现在我只是想了解。。。 读到这篇文章我真的很惊讶: <xsl:template match="par"> [...] <xsl:variable name="pos"><xsl:value-of select="position()"/></xsl:variable> <xsl:variable name="page"><xsl:value-of select=".
<xsl:template match="par">
[...]
<xsl:variable name="pos"><xsl:value-of select="position()"/></xsl:variable>
<xsl:variable name="page"><xsl:value-of select="../par[position()=$pos]/@page"/></xsl:variable>
[...]
<xsl:if test="$page!=''">
<xsl:if test="$page!=@page">
<div style="text-align:right;page-break-before:always">
<font color="#000000" style="font-style:normal;text-decoration:none;font-weight:normal">
- <xsl:value-of select="$page"/> -
<br/>
</font>
</div>
</xsl:if>
</xsl:if>
[...]
</xsl:template>
[...]
[...]
- -
[...]
我是愚蠢还是这个代码愚蠢
如果是我,有人能告诉我,在这种情况下,$page和@page有什么不同吗?
谢谢用于设置$pos
变量的“standalone”position()
函数非常依赖于上下文,在设置$page
变量时,其计算方式与方括号内的position()
不同
考虑一个示例(此处测试):
源XML:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- Edited by XMLSpy® -->
<catalog>
<cd>
<title>Empire Burlesque</title>
<artist>Bob Dylan</artist>
<country>USA</country>
<company>Columbia</company>
<price>10.90</price>
<year>1985</year>
</cd>
<cd>
<title>Hide your heart</title>
<artist>Bonnie Tyler</artist>
<country>UK</country>
<company>CBS Records</company>
<price>9.90</price>
<year>1988</year>
</cd>
<cd>
<title>Greatest Hits</title>
<artist>Dolly Parton</artist>
<country>USA</country>
<company>RCA</company>
<price>9.90</price>
<year>1982</year>
</cd>
<cd>
<title>Still got the blues</title>
<artist>Gary Moore</artist>
<country>UK</country>
<company>Virgin records</company>
<price>10.20</price>
<year>1990</year>
</cd>
<cd>
<title>Eros</title>
<artist>Eros Ramazzotti</artist>
<country>EU</country>
<company>BMG</company>
<price>9.90</price>
<year>1997</year>
</cd>
<cd>
<title>One night only</title>
<artist>Bee Gees</artist>
<country>UK</country>
<company>Polydor</company>
<price>10.90</price>
<year>1998</year>
</cd>
<cd>
<title>Sylvias Mother</title>
<artist>Dr.Hook</artist>
<country>UK</country>
<company>CBS</company>
<price>8.10</price>
<year>1973</year>
</cd>
<cd>
<title>Maggie May</title>
<artist>Rod Stewart</artist>
<country>UK</country>
<company>Pickwick</company>
<price>8.50</price>
<year>1990</year>
</cd>
<cd>
<title>Romanza</title>
<artist>Andrea Bocelli</artist>
<country>EU</country>
<company>Polydor</company>
<price>10.80</price>
<year>1996</year>
</cd>
<cd>
<title>When a man loves a woman</title>
<artist>Percy Sledge</artist>
<country>USA</country>
<company>Atlantic</company>
<price>8.70</price>
<year>1987</year>
</cd>
<cd>
<title>Black angel</title>
<artist>Savage Rose</artist>
<country>EU</country>
<company>Mega</company>
<price>10.90</price>
<year>1995</year>
</cd>
<cd>
<title>1999 Grammy Nominees</title>
<artist>Many</artist>
<country>USA</country>
<company>Grammy</company>
<price>10.20</price>
<year>1999</year>
</cd>
<cd>
<title>For the good times</title>
<artist>Kenny Rogers</artist>
<country>UK</country>
<company>Mucik Master</company>
<price>8.70</price>
<year>1995</year>
</cd>
<cd>
<title>Big Willie style</title>
<artist>Will Smith</artist>
<country>USA</country>
<company>Columbia</company>
<price>9.90</price>
<year>1997</year>
</cd>
<cd>
<title>Tupelo Honey</title>
<artist>Van Morrison</artist>
<country>UK</country>
<company>Polydor</company>
<price>8.20</price>
<year>1971</year>
</cd>
<cd>
<title>Soulsville</title>
<artist>Jorn Hoel</artist>
<country>Norway</country>
<company>WEA</company>
<price>7.90</price>
<year>1996</year>
</cd>
<cd>
<title>The very best of</title>
<artist>Cat Stevens</artist>
<country>UK</country>
<company>Island</company>
<price>8.90</price>
<year>1990</year>
</cd>
<cd>
<title>Stop</title>
<artist>Sam Brown</artist>
<country>UK</country>
<company>A and M</company>
<price>8.90</price>
<year>1988</year>
</cd>
<cd>
<title>Bridge of Spies</title>
<artist>T`Pau</artist>
<country>UK</country>
<company>Siren</company>
<price>7.90</price>
<year>1987</year>
</cd>
<cd>
<title>Private Dancer</title>
<artist>Tina Turner</artist>
<country>UK</country>
<company>Capitol</company>
<price>8.90</price>
<year>1983</year>
</cd>
<cd>
<title>Midt om natten</title>
<artist>Kim Larsen</artist>
<country>EU</country>
<company>Medley</company>
<price>7.80</price>
<year>1983</year>
</cd>
<cd>
<title>Pavarotti Gala Concert</title>
<artist>Luciano Pavarotti</artist>
<country>UK</country>
<company>DECCA</company>
<price>9.90</price>
<year>1991</year>
</cd>
<cd>
<title>The dock of the bay</title>
<artist>Otis Redding</artist>
<country>USA</country>
<company>Atlantic</company>
<price>7.90</price>
<year>1987</year>
</cd>
<cd>
<title>Picture book</title>
<artist>Simply Red</artist>
<country>EU</country>
<company>Elektra</company>
<price>7.20</price>
<year>1985</year>
</cd>
<cd>
<title>Red</title>
<artist>The Communards</artist>
<country>UK</country>
<company>London</company>
<price>7.80</price>
<year>1987</year>
</cd>
<cd>
<title>Unchain my heart</title>
<artist>Joe Cocker</artist>
<country>USA</country>
<company>EMI</company>
<price>8.20</price>
<year>1987</year>
</cd>
</catalog>
是,
$page
和@page
的字符串值可以不同:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/*">
<xsl:apply-templates select="*[@page mod 2 = 0]"/>
</xsl:template>
<xsl:template match="par">
<xsl:variable name="pos">
<xsl:value-of select="position()"/>
</xsl:variable>
<xsl:variable name="page">
<xsl:value-of select="../par[position()=$pos]/@page"/>
</xsl:variable>
<xsl:if test="$page!=''">
<xsl:if test="$page!=@page">
<div style="text-align:right;page-break-before:always">
<font color="#000000" style="font-style:normal;text-decoration:none;font-weight:normal"> -
<xsl:value-of select="$page"/> -
<br/>
</font>
</div>
</xsl:if>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
<t>
<par page="1"/>
<par page="2"/>
<par page="3"/>
<par page="4"/>
<par page="5"/>
<par page="6"/>
<par page="7"/>
</t>
说明:
<div style="text-align:right;page-break-before:always">
<font color="#000000" style="font-style:normal;text-decoration:none;font-weight:normal"> -
1 -
<br/>
</font>
</div>
<div style="text-align:right;page-break-before:always">
<font color="#000000" style="font-style:normal;text-decoration:none;font-weight:normal"> -
2 -
<br/>
</font>
</div>
<div style="text-align:right;page-break-before:always">
<font color="#000000" style="font-style:normal;text-decoration:none;font-weight:normal"> -
3 -
<br/>
</font>
</div>
在模板内或在xsl:for each
中,表达式:
position()
当前节点在当前节点列表中的位置。这通常与当前节点在其同名同级节点集中的位置不同。这可能是一个很好的问题,因为在
[…]
中不可能回答这个问题@page
是当前节点的page
属性$page
是$pos
-thpar
节点的page
属性。为什么你认为它们应该相等?@hroptatyr和$pos是当前位置的最大值?我不知道[…]
位中发生了什么。您可以更改当前节点。上面的$pos
是当前节点的位置,是的。但该节点不必是par
节点。这个问题似乎离题了,因为它是关于XSL编码样式的。感谢您的示例,我现在理解了“上下文相关”的含义。但在您的示例中,[x]始终等于[-x]正确。我只是检查变量是否设置正确。这个输出实际上并不需要。重要的是position()。在“独立”版本中,它统计所有XML元素(在我的示例中),在方括号中。/cd[position()=$pos]
它只统计cd
元素。+1用于解释position()
根据使用位置更改其函数的方式。@ABach,欢迎您。
<div style="text-align:right;page-break-before:always">
<font color="#000000" style="font-style:normal;text-decoration:none;font-weight:normal"> -
1 -
<br/>
</font>
</div>
<div style="text-align:right;page-break-before:always">
<font color="#000000" style="font-style:normal;text-decoration:none;font-weight:normal"> -
2 -
<br/>
</font>
</div>
<div style="text-align:right;page-break-before:always">
<font color="#000000" style="font-style:normal;text-decoration:none;font-weight:normal"> -
3 -
<br/>
</font>
</div>
position()