XSLT教程

<xsl:template>
2007-3-30

XSLT 转换 <xsl:value-of>

An XSL style sheet consists of one or more set of rules that are called templates.
XSL样式表是由一个或者更多的被称为“模板（templates）”的规则设置（set of rules）组成的。

Each template contains rules to apply when a specified node is matched.
当与指定的节点匹配时，每个模板都包含了应用规则。

The <xsl:template> Element
XSLT<xsl:template>元素

The <xsl:template> element is used to build templates.
XSLT<xsl:template>元素是用于创建模板的。

The match attribute is used to associate a template with an XML element. The match attribute can also be used to define a template for the entire XML document. The value of the match attribute is an XPath expression (i.e. match="/" defines the whole document).
Match的属性的作用是使模板和XML与元素相结合。Match属性也可以为整个XML定义模版。Match属性值是一个XPath表达式。（也就是match="/" defines the whole document）

Ok, let's look at a simplified version of the XSL file from the previous chapter:
好了，现在让我们来看一下摘自前面章节的XSL文件的简易版本。

<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"

xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
 <html>
 <body>
   <h2>My CD Collection</h2>

   <table border="1">
     <tr bgcolor="#9acd32">
       <th>Title</th>
       <th>Artist</th>

     </tr>
     <tr>
       <td>.</td>
       <td>.</td>
     </tr>

   </table>
 </body>
 </html>
</xsl:template>
</xsl:stylesheet>

Since an XSL style sheet is an XML document itself, it always begins with the XML declaration: <?xml version="1.0" encoding="ISO-8859-1"?>.
因为XSL样式表是XML文档本身，所以它一般都从XML开始声明：<?xml version="1.0" encoding="ISO-8 59-1"?>。

The next element, <xsl:stylesheet>, defines that this document is an XSLT style sheet document (along with the version number and XSLT namespace attributes).
下一个元素<xsl:stylesheet>，把这份文档定义为XSLT样式表文档（跟版本号和XSLT命名空间属性一样）。

The <xsl:template> element defines a template. The match="/" attribute associates the template with the root of the XML source document.
<xsl:template>元素定义了一份模板。Match=”/”属性使模板和XML源文件的根目录联系起来。

The content inside the <xsl:template> element defines some HTML to write to the output.
<xsl:template>元素里面的内容定义一些HTML来对结果进行书写。

The last two lines define the end of the template and the end of the style sheet.
最后两行定义了模版的结束符和样式表的结束符。

The result of the transformation above will look like this:
通过上面的代码，转换的结果如下：

My CD Collection
我的CD集

Title Artist
. .

 

View the XML file, View the XSL file, and View the result
查看XML文件, 查看 XSL文件, 还有 看下最后的结果

The result from this example was a little disappointing, because no data was copied from the XML document to the output.
通过这个例子所产生的结果有点令人失望，因为没有将任何数据从XML文档中复制到结果当中。

In the next chapter you will learn how to use the <xsl:value-of> element to select values from the XML elements.
下一章当中，你将会学习如何通过<xsl:value-of>元素从XML元素中选择值。

 

XSLT 转换 <xsl:value-of>