=== Create XML file === I created a xml file with animals and their attributes. \\ // animals.xml //



 

 
  
    Cow
    800KG
    
      2
      1
      1
      2
    
    
      yes
    
    4
  
 
  
    Sheet
    150KG
    
      2
      1
      1
      2
    
    
      yes
    
    4
  
 
  
    Horse
    500KG
    
      2
      1
      1
      2
    
    
      yes
    
    4
  
 
  
    Pig
    300KG
    
      2
      1
      1
      2
    
    
      doubtful
    
    4
  
 
  
    Mockingbird
    0.5KG
    
      2
      1
      1
      2
    
    
      yes
    
    2
  
 
  
    Fur Seal
    450KG
    
      2
      1
      1
      2
    
    
      yes
    
    0
  
 
  
    Habor Seal
    450KG
    
      2
      1
      1
      0
    
    
      yes
    
    0

=== DTD file for animals === The XML file above will be validated against a DTD file. And the DTD file is defined below

=== Validate using DTD === This code reference the DTD file in the XML file.

=== XSD XML schema === Now I switch to XSD. Below is the XSD file I am going to use \\

=== Use XSD file in XML === The syntax to link the xsd file to the xml file is

It is defined in the root element as attribute. === Validate the XSD itself === I use the w3c validate tool for the XSD. \\ http://www.w3.org/2001/03/webdata/xsv It is successfully validated


Schema validating with XSV 3.1-1 of 2007/12/11 16:20:05

    * Target: file:/usr/local/XSV/xsvlog/tmp2yEmYsuploaded
         (Real name: animals.xsd)
    * docElt: {http://www.w3.org/2001/XMLSchema}schema
    * Validation was strict, starting with type [Anonymous]
    * The schema(s) used for schema-validation had
        no errors
    * No schema-validity problems were found in the target

=== validate the XML file with DTD === http://validator.w3.org/check \\ The above validator is used. In the first attempt it found 7 errors which are all of the same type


Line 21, Column 15: value of attribute "id" invalid: "0" cannot start a name

  

✉

It is possible that you violated the naming convention for this attribute. For example, id and name attributes must begin with a letter, not a digit.

. I added "a" in front of the id value, i.e ie="a0001". Then it passed the check without any error


This document was successfully checked as XML!
Result: 	Passed, 1 warning(s)

And the only warning comes from the encoding. As I copy/paste the code directly into the online checker, it has to trust me with that the encoding is UTF-8 as I defined.