DTD and Schema difference constraints constraints

DTD and Schema difference constraints constraints

　　　　

　　　　1 difference: When the xml file specifies a DTD constraints , the only designated a ;

　　　　　　　　But if you specify Schema constraint , then because there is a name space, you can specify multiple

 

　　　　The difference between 2: Schema follow xml syntax , and DTD and xml are using their own special syntax

 

　　　　The difference between 3: schema supports more than DTD data types

 

　　　　The difference between 4: DOM and SAX parsing easier way to resolve schema