Example of validation of an XML file:

1. I created the DTD-file film.dtd with the following content:

       <!ELEMENT film (title, person+)>
       <!ELEMENT title (#PCDATA)>
       <!ELEMENT person EMPTY>
       <!ATTLIST person
         name CDATA #REQUIRED
         role (actor | photographer | director | author | administrator)
         #IMPLIED
       >

2. I created the XML-file film.xml with the following content:

       <?xml version="1.0" ?>
       <!DOCTYPE film SYSTEM "film.dtd">
       <film>
       <title>
       The Postman Always Rings Twice</title>
       <person name="Lana Turner" role="actor"/>
       <person name="John Garfield" role="actor"/>
       <person name="Tay Garnet" role="director"/>
       <person name="James M. Cain" role="author"/>
       </film>

3. I put both files on the directory: http://dsv.su.se/jpalme/internet-course/xml/
   
   
4. I accessed the validator at http://www.stg.brown.edu/service/xmlvalid/ and in the URI field wrote: http://dsv.su.se/jpalme/internet-course/xml/film.xml
   

   URI:

   Suppress warning messages  Relax namespace checks

   
   
5. Then I clicked on the button in the main window of the validator and got the following response:

Validation Results for http://dsv.su.se/jpalme/internet-course/xml/film.xml

Document validates OK.