Loading XML with defined DTD

Question

Hi all!
I create XML and DTD. All working fine when I open it in MS XMLNotepad.
But when I try to load my XML in validating mode I get error
Error opening external DTD 'ReportsDTD.dtd'.
I open my XML through class loader as resource stream and then load it from this stream.
In XML I have such string
<!DOCTYPE DEFINITIONS SYSTEM "ReportsDTD.dtd">
Both xml and dtd are located in same directory.
Can anybody explain me whats wrong?
Mike

Answer 1

Reading from a stream, the parser has no idea what the "current directory" is.
So, when you reference a relative URL like "ReportsDTD.dtd", this means to find the DTD in the "same directory" as the current XML document.
You need to properly set the Base URL of the original input stream so that the parser knows what the base directory is.
Or, alternatively you can use getResource on the Class object that returns a URL and that has embedded within it the correct base URL "directory" info to work correctly.
So, if I have a "foo.xml" file that references "foo.dtd" inside, I can use the following code:
import java.net.URL;
import oracle.xml.parser.v2.*;
public class Class1
public static void main(String[] a) throws Throwable {
Class1 c = new Class1();
URL u = c.getClass().getResource("foo.xml");
DOMParser p = new DOMParser();
p.parse(u);
p.getDocument().print(System.out);
public Class1() { }
}Steve Muench
Development Lead, Oracle XSQL Pages Framework
Lead Product Manager for BC4J and Lead XML Evangelist, Oracle Corp
Author, Building Oracle XML Applications
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