XML in java..need help with it

Question

hi, ive been programming in java for quite some time now. now im learning how to integrate it with XML. I am learning XML right now. I am trying to deveop a program, using java and XML which can store contacts of a few person(using XML) and then retrieve the contact of a certain person when asked (using java).
I have defined the scema in a file name: contactlist-schema
and the corrsponding XML file is named: contactlist.xml
I have created a java program to traverse the contactlist.xml file (document = builder.parse(new File("contactlist.xml")))
it compiles successfully, but when I try to execute it, it gives me this msg:
Parse error: Element type "contactlist" is not declared.
Can somebody pleeeaaase help me with this problem

Answer 1

i am using DOM, the schema is:
<?xml version = "1.0"?>
<!DOCTYPE contactlist-schema>
<Schema xmlns = "urn:schemas-microsoft-com:xml-data"
     xmlns:dt = "urn:schemas-microsoft-com:datatypes">
<ElementType name = "contactlist" model = "closed">
     <element type = "contact" minOccurs = "0" maxOccurs = "*"/>
</ElementType>
<ElementType name = "contact" model = "closed">
     <element type = "name" minOccurs = "0" maxOccurs = "*"/>
</ElementType>
<ElementType name = "name" model = "closed">
     <AttributeType name = "tel" dt:type = "string"/>
     <attribute type = "tel"/>
     <AttributeType name = "email" dt:type = "string"/>
     <attribute type = "email"/>
</ElementType>
</Schema>
the corresponding xml file is:
<?xml version = "1.0"?>
<!DOCTYPE contactlist>
<contactlist xmlns = "x-schema:contactlist-schema.xml">
     <contact>
          <name>
               Sarah
               <tel> 0161-786-8611 </tel>
               <email> [email protected] </email>
          </name>
     </contact>
     <contact>
          <name>
               Anne
               <tel> 0781-787-8956 </tel>
               <email> [email protected] </email>
          </name>
     </contact>
     <contact>
          <name>
               Zac
               <tel> 0795-123-4567 </tel>
               <email> [email protected] </email>
          </name>
     </contact>
     <contact>
          <name>
               Lena
               <tel> 0414-456-1234 </tel>
               <email> [email protected] </email>
          </name>
     </contact>
     <contact>
          <name>
               Lin
               <tel> 0786-025-6974 </tel>
               <email> [email protected] </email>
          </name>
     </contact>
     <contact>
          <name>
               Emma
               <tel> 0161-881-1234 </tel>
               <email> [email protected] </email>
          </name>
     </contact>
</contactlist>