Detailed introduction to the code case analysis of XSLT template conversion XML document

XML documents can only represent the content of data, while the actual data is to be presented on the webpage. You can use CSS to format the XML document and display it. this content has been described in detail in the previous article. In addition to CSS, there is also a language that can show XML data content on the webpage, that is, XSL. The XSL language includes XSLT (XSLTransformation) and FO (FormatObject ). XSLT documents can convert XML documents into other documents, such as HTML and Text. FO is used to format the output. since W3C also forms a unified standard for FO, only the usage of XSLT is described here.

When using XSLT, the most important part is to select the XML node value and create a template. The tag used to create the template is Generally, this tag requires a match attribute to determine the XML nodes it matches. The label used to select the XML node value is This label requires the select attribute to determine the XML nodes it matches. Here is a simple example to illustrate the following XML document:

1
 2
 3
 
  
4
  
   
5
   
    
Xml application series
   6. toddler7
   
    
2009-03-23
   8
  9
 

Code description: the first line is the declaration part of the XML file. The second line introduces the XSLT file. the type attribute indicates that the file type is text/xsl, and the href attribute points to an XSLT file, the file name is stylesheet. xslt. The third line is later than the XML document section. The following is the content of stylesheet. xslt:

1
 2
 
  
3
  
   
456
   The first XSLT file789
   101112
  13
  
   
14
   
   
 
  
    
15
    
  
     16 
    17 
    18 
    19 
   2021 
  
 
   
Title
Author
Date
   
 
22
  23
  
   
242526
   272829
   303132
   333435
  36
 

Code description: Because the XSLT document is still in XML format, the first line is the header declaration of XML; the second line is the XSLT version and namespace declaration, the label is the heel node of the XSLT document. Use Create a template. select = "/" indicates that the root node of the document is matched. Lines 4 to 11th are the HTML node information to be generated by this node, and the ninth line is A tag indicates an application template. select = "xml" indicates that the template to be called is a template that matches the XML node. this template appears in row 3. All the rows (except the 26th rows) are repeated and are not described too much. Row 3 shows the content of the name tag. Use IE to open the XML file. the displayed content is as follows:

In addition, XSLT supports process control, condition selection, cyclic processing, and element sorting. An example is provided below. the content of the XML document is as follows:

1
 2
 3
 
  
4
  
   
5
   
    
6
    Web page and Web program design7. Wu Libing8
    
     
9
     
      
Machinery Industry Press
     10
     
      
2009-01 1
     11
     
      
16.50
     12
    13
   14
   
    
15
    Software engineering16 Deng Liangsong17
    
     
18
     
      
Xi'an Electronic Technology Press
     19
     
      
2005-06-10
     20
     
      
33.20
     21
    22
   23
  24
  
   
25
   
    
26
    Camellia27 Zhong Ma28
    
     
29
     
      
Foreign Language Publishing House
     30
     
      
2005-06-30
     31
     
      
22.00
     32
    33
   34
   
    
35
    Dream of Red Mansions36. Cao Xueqin37
    
     
38
     
      
China Education Press
     39
     
      
2005-09-06
     40
     
      
55.00
     41
    42
   43
  44
 

The content of the bookListStyle. xslt file is as follows:

 
   
                    
   Book List        
                       
               
                
   
   
    
Color:
    
     
Blue
                  
   
                   
                    
                      
     
      
Category: Computer books
                       
     
      
Category: Novels
                     
    Author:
                    
    
Press:
                    
    
Publication date:
                    
    
Pricing:
    RMB
   
   
 
          
    
  

    Book List 
  
          
    
  
 
   
 
    
No.
 
    
Category
 
    
Title
 
    
Author
 
    
Press
 
    
Publication date
 
    
Pricing
 
   
 
   
 
    
  
 
    
  
 
    
  
 
    
  
 
    
  
 
    
  
 
    
  
 
   
 
  
   
 
            
  
 

The code is not analyzed here. please understand the code and write your own XSLT template. The running effect of this code is as follows:

The above section details the code case analysis of XSLT template conversion XML document. For more information, see other related articles in the first PHP community!