Validate w/ schema ---Problem setting up JAXP1.2 jar

Question

Sorry, I may just be being a retard
I am trying to validate an xml document with a schema. I know that I need to use a JAXP 1.2 parser.
I am using Eclipse 2.1 right now, but I tried this through the command prompt to see if it was something I was doing specifically in eclipse.
First, I want to make sure that I have the proper jar.
Where do I get the JAXP 1.2 jar? The only place that I found it was with the Java Web Services Developer Pack 1.4 release. Is that the correct place to get it?
Second, if so, what do I need to do to get java to use that jar instead of existing one? From what I read, I just need to put the new jar in the classpath first. Maybe I am doing this worng, please explain what I should be doing.
Here is the code that I am running. I keep getting the SAXNotRecognizedException that they say you get when you don't have a JAXP 1.2 parser.
import java.io.*;
import java.sql.*;
import javax.xml.parsers.*;
import org.apache.commons.digester.Digester;
public class dhq {
   static final String JAXP_SCHEMA_LANGUAGE =
      "http://java.sun.com/xml/jaxp/properties/schemaLanguage";
   static final String W3C_XML_SCHEMA =
      "http://www.w3.org/2001/XMLSchema";
   static final String JAXP_SCHEMA_SOURCE =
      "http://java.sun.com/xml/jaxp/properties/schemaSource";
   static final String DHQWEB_SCHEMA = "dhqweb.xsd";
   static final String DHQWEB_XML = "DHQ.xml";
   public static void main(String[] args) {
      try {
      SAXParserFactory factory =
         SAXParserFactory.newInstance();
      factory.setValidating(true);
      SAXParser parser = factory.newSAXParser();
      parser.setProperty(JAXP_SCHEMA_LANGUAGE, W3C_XML_SCHEMA); //Throws SAXNotRecognizedException here
      parser.setProperty(JAXP_SCHEMA_SOURCE, new File(DHQWEB_SCHEMA));
      Digester d = new Digester(); //Haven't gotten to implementing this yet.
      parser.parse(new FileInputStream(new File(DHQWEB_XML)), d);Thanks in advance for any help, especially for helping with such a newb problem.

Answer 1

Here is some content from the following install link:
http://java.sun.com/xml/docs/summer02/jaxp/ReleaseNotes.html#deploy
Using JAXP 1.2 with the Java Web Services Developer Pack (Java WSDP)
Again, if you are using the Java WSDP installation process to do the update, then you don't have to worry about the updates. But if you are updating individual jar files, copy them to
<JWSDP_HOME>/common/endorsed/
Using JAXP 1.2 with Tomcat version 4.0.3 or 3.3
First, be sure to remove xerces.jar from
<TOMCAT_HOME>/common/lib/
The reason for that step is that xerces.jar contains earlier Xerces implementations which will interfere with the operation of JAXP 1.2.
The next step depends on which version of the Java 2 SDK you are using:
For version 1.4 of the Java 2 SDK:
You need to know that JAXP 1.1 is built into that version of the platform. JAXP 1.1 has a smaller footprint, but JAXP 1.2 implements XML Schema, and it also includes transform compiler, XSLTC.
To use the JAXP 1.2 implementation instead of the JAXP 1.1 implementation, copy all of the JAR files except jaxp-api.jar to
<TOMCAT_HOME>/common/lib/
Then, when running Tomcat, set the java.endorsed.dirs system property to
<TOMCAT_HOME>/common/lib/
Note:
The jaxp-api.jar file should not be copied, because it contains high-level factory APIs that are not subject to change.
For version 1.3 of the Java 2 SDK:
Copy all 6 JAR files to
<TOMCAT_HOME>/common/lib/
and add that directory to your classpath.
Using JAXP 1.2 with version 1.4.0 of the Java 2 platform
Version 1.4 of the Java 2 platform has JAXP 1.1 implementations built in. JAXP 1.1 has a smaller footprint, but JAXP 1.2 implements XML Schema and the transform compiler, XSLTC.
To use the JAXP 1.2 implementation, copy all of the jar files except jaxp-api.jar into
<JAVA_HOME>/jre/lib/endorsed/
Note:
The jaxp-api.jar file should not be copied, because it contains high-level factory APIs that are not subject to change.