Weird! I thought crimson.jar/jaxp.jar were included in rt.jar for jsk 1.4!!

I am trying a Wrox Books Example (Chapter 2 in Professional Java XML), and if I do this:
  java BookMain
I get this error:
  Exception in thread "main" java.lang.NullPointerException
    at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:524)
    at org.apache.crimson.parser.Parser2.parse(Parser2.java:305)
    at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:433)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:346)
    at wrox.book.BookMain.main(BookMain.java:34)
But if I do this:
  java -Xbootclasspath:D:\jaxp\jaxp-1.1\crimson.jar;D:\jaxp\jaxp-1.1\jaxp.jar;D:\jdk1.4\jre\lib\rt.jar BookMain
Then it works!!!
What's up with that? Is there a later version of crimson in jaxp1.1 than jdk1.4? Is there a known bug?

I found the same NullPointerException at the same place for the BookMain exercise. The solution (which took a while for me to determine) was to add a missing line in BookMain:
factory.setNameSpaceAware(true);
After that the code ran fine.
I'm surprised that the parsers die in such a case (rather than raising an exception saying they don't understand the namespace-related XML).

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I have already gone over the following info
http://technology.amis.nl/blog/215/organization-of-bc4j-domain-eo-and-business-vo-package
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http://radio-weblogs.com/0118231/2005/09/29.html
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Difference between adding and importing BC4J
http://radio-weblogs.com/0118231/stories/2005/08/11/differenceBetweenAddingAndImportingBusinessComponents.html
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http://download.oracle.com/docs/cd/B32110_01/web.1013/b25947/bcadvgen.htm#CHEFECGD

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OC4J
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<code>
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Where is the jar for me to import?

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          >
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          > Ashish

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Weird! I thought crimson.jar/jaxp.jar were included in rt.jar for jsk 1.4!!

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