DevOps, CI/CD and Automation

Hi,

I ran oracg on the po.xsd schema from X3Cs XML Schema Part 0: Primer which successfully generated the java codes. I ran into problems when I compile the generated classes. Here's what I'm getting:

C:\oracle\xml\xdk\demo\java\classgen\Po2>javac -classpath ".;C:\oracle\xml/lib/xmlparserv2.jar;C:\oracle\xml/lib/xschema.jar;C:\oracle\xml/l
ib/classgen.jar;.;C:\Program Files\VicunaJ521\java\lib\collections.jar;C:\Program Files\VicunaJ521\java\lib\vicunalite.jar;C:\Program Files\
XConverter\XConverter.jar;C:\Program Files\XConverter\IDLGenerator.jar; c:\jdk1.2.2\lib\dt.jar;c:\jdk1.2.2\lib\jvm.jar;c:\jdk1.2.2\lib\tools
.jar;c:\oracle\ora81\jdbc\lib\classes12.zip;c:\oracle\ora81\jdbc\nls_charset12.zip;C:\oracle\xml\lib\classgen.jar;C:\oracle\xml\lib\xmlparse
rv2.jar" *.java
.\types\PurchaseOrderType.java:75: Type expected.
public void addComment(null.Comment thecomment)
^
.\types\Items.java:141: Type expected.
public void addComment(null.Comment thecomment)
^
2 errors

Running the demo which comes with oracles version of po.xsd was OK. What's the difference between the po.xsd from oracle and the po.xsd from W3C? Are there any W3C recommendation for XML Schema not supported by Oracle's class generator?