The problem persists!

Question

I posted this problem earlier, but havent found any solution as yet. The problem persists so I am poting the problem again. I am trying to deveop a program, using java and XML which can store contacts of a few persons(using XML) and then retrieve the contact of a certain person when asked (using java).
I have defined the schema 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.
i am using DOM to parse the XML document, 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>
i can post my java code as well if sumbody wants to have alook at it

Answer 1

Should you put the complete DOCTYPE reference in (i.e including an externalId)?