Xml learning (2) xml document tree structure

XML documents form a tree structure. XML documents must contain root elements. This element is the parent element of all other elements. The elements in the XML document form a document tree. The tree starts from the root and expands to the bottom of the tree. All elements can have child elements: XML documents form a tree structure

The XML document must containRoot element. This element is the parent element of all other elements.

The elements in the XML document form a document tree. The tree starts from the root and expands to the bottom of the tree.

All elements can have child elements:

   
      
   
    .....
     
  
 

Represents a book in the following XML:

 
    
   Everyday Italian   Giada De Laurentiis   
   
    2005
      
   
    30.00
    
  
    
   Harry Potter   J K. Rowling   
   
    2005
      
   
    29.99
    
  
    
   Learning XML   Erik T. Ray   
   
    2003
      
   
    39.95
    
  
 

In this example, the root element is . All All elements are included in .

The element has four child elements: , <Author>, , .

The above is the xml learning (2) content of the xml document tree structure. For more information, see PHP Chinese network (www.php1.cn )!