Using xmlns in schemas that reference Oracle registered schema

Question

I have two schemas: a.xsd and b.xsd. b.xsd uses an xmlns to reference a.xsd. But when I call dbms_xmlschema.registerSchema, the a.xsd schema works ok, but the b.xsd schema fails with the following error:
ERROR at line 1:
ORA-31154: invalid XML document
ORA-19202: Error occurred in XML processing
LSX-00023: unknown namespace URI "http://xmlns/a"
ORA-06512: at "XDB.DBMS_XMLSCHEMA_INT", line 0
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 26
ORA-06512: at line 2
I've tried with and without an xsi:schemaLocation in b.xsd and both fail with the same error.
Has anyone had any luck using this multiple schema reference functionality? I'm on the latest Oracle 9i (9.2.0.3.0) 64-bit on Solaris 2.8.
Thanks,
-Darren
Here's the output of my sqlplus session:
SQL*Plus: Release 8.1.6.0.0 - Production on Wed May 14 13:43:56 2003
(c) Copyright 1999 Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.3.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.3.0 - Production
SQL> set long 10000
SQL> SELECT user FROM dual
2 /
USER
XDB
SQL> SELECT getDocument('xsd/a.xsd') FROM dual
2 /
GETDOCUMENT('XSD/A.XSD')
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://xmlns/a" xmlns="http://xmlns/a" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="a">
<xs:simpleType>
<xs:restriction base="xs:string">
     <xs:maxLength value="100"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:schema>
GETDOCUMENT('XSD/A.XSD')
SQL> BEGIN
2 dbms_xmlschema.registerSchema(
3      schemaURL => 'http://xmlns/a',
4      schemaDoc => getDocument('xsd/a.xsd'),
5      local => false);
6 END;
7 /
PL/SQL procedure successfully completed.
SQL> COMMIT
2 /
Commit complete.
SQL> SELECT owner, schema_url FROM all_xml_schemas WHERE schema_url = 'http://xmlns/a'
2 /
OWNER
SCHEMA_URL
XDB
http://xmlns/a
SQL> SELECT getDocument('xsd/b.xsd') FROM dual
2 /
GETDOCUMENT('XSD/B.XSD')
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://xmlns/b" xmlns="http://xmlns/b" xmlns:a="http://xmlns/a" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="b">
<xs:complexType>
<xs:sequence>
     <xs:element name="c">
     <xs:simpleType>
     <xs:restriction base="xs:string">
     <xs:maxLength value="200"/>
     </xs:restriction>
     </xs:simpleType>
     </xs:element>
     <xs:element ref="a:a"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
SQL> BEGIN
2 dbms_xmlschema.registerSchema(
3      schemaURL => 'http://xmlns/b',
4      schemaDoc => getDocument('xsd/b.xsd'),
5      local => false);
6 END;
7 /
BEGIN
ERROR at line 1:
ORA-31154: invalid XML document
ORA-19202: Error occurred in XML processing
LSX-00023: unknown namespace URI "http://xmlns/a"
ORA-06512: at "XDB.DBMS_XMLSCHEMA_INT", line 0
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 26
ORA-06512: at line 2
SQL> SELECT getDocument('xsd/b-with-location.xsd') FROM dual
2 /
GETDOCUMENT('XSD/B-WITH-LOCATION.XSD')
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema
     targetNamespace="http://xmlns/b"
     xmlns="http://xmlns/b"
     xmlns:a="http://xmlns/a"
     xmlns:xs="http://www.w3.org/2001/XMLSchema"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://xmlns/a http://xmlns/a">
<xs:element name="b">
<xs:complexType>
<xs:sequence>
     <xs:element name="c">
     <xs:simpleType>
     <xs:restriction base="xs:string">
     <xs:maxLength value="200"/>
     </xs:restriction>
     </xs:simpleType>
     </xs:element>
     <xs:element ref="a:a"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
SQL> BEGIN
2 dbms_xmlschema.registerSchema(
3      schemaURL => 'http://xmlns/b',
4      schemaDoc => getDocument('xsd/b-with-location.xsd'),
5      local => false);
6 END;
7 /
BEGIN
ERROR at line 1:
ORA-31154: invalid XML document
ORA-19202: Error occurred in XML processing
LSX-00023: unknown namespace URI "http://xmlns/a"
ORA-06512: at "XDB.DBMS_XMLSCHEMA_INT", line 0
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 26
ORA-06512: at line 2
SQL> COMMIT
2 /
Commit complete.
SQL> SELECT owner, schema_url FROM all_xml_schemas
2 WHERE schema_url = 'http://xmlns/a' OR schema_url = 'http://xmlns/b'
3 /
OWNER
SCHEMA_URL
XDB
http://xmlns/a
SQL> QUIT
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.3.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.3.0 - Production

Answer 1

This is resolved.