Handling a schema URL that is also a container

Question

Greetings,
I have two schema URLs, say "http://schema1" and "http://schema1/schema2". I successfully registered the first in Oracle 10g R2 XMLDB. When I attempt to register the second, I receive the following error:
ORA-31002 Path name "http://schema1" is not a container
It would be extremely difficult to change either schema URL. Is this Oracle XMLDB restriction? If so, any suggestions how I might workaround it without changing either URL?

Answer 1

I would tend to argue that it falls into the category of if it hurts please don't do it... Having a SchemaLocationHint that is also a folder that contains another of the XML Schemas makes little or not sense to me unless I'm missing something. I don't think you could represent this model on most file systems..
Are you prepared to modify the XML Schemas during registration in order to get past this problem...
Are you sure you cannot change the schemaLocationHint you are using. This is not the same as changing then nanespace, which would be a real problem. Note that in the following example I changed the schemaURL passed to register schema and the value of the schemaLocation attribute in the import element of the second XML schema. I did not change the namespaces at all..
SQL> begin
  2   dbms_xmlschema.registerSchema(
  3   'http://sample1.xsd',
  4   '<schema xmlns="http://www.w3.org/2001/XMLSchema"
  5    targetNamespace="http://sample1"
  6    xmlns:samp1="http://sample1"
  7    version="1.0">
  8    <simpleType name="departmentIdType">
  9     <restriction base="integer">
10      <enumeration value="10"/>
11      <enumeration value="20"/>
12      <enumeration value="30"/>
13      <enumeration value="40"/>
14     </restriction>
15    </simpleType>
16    <element name="company">
17    <complexType>
18    <sequence>
19     <element name="department">
20      <complexType>
21       <sequence>
22        <element name = "id"   type = "samp1:departmentIdType"/>
23        <element name = "name" type = "string"/>
24       </sequence>
25      </complexType>
26     </element>
27    </sequence>
28    </complexType>
29    </element>
30  </schema>',
31   TRUE, TRUE, FALSE, FALSE);
32  end;
33  /
PL/SQL procedure successfully completed.
SQL> begin
  2   dbms_xmlschema.registerSchema(
  3   'http://sample1/sample2.xsd',
  4   '<schema xmlns="http://www.w3.org/2001/XMLSchema"
  5    targetNamespace="http://sample1/sample2"
  6    xmlns:samp2="http://sample1/sample2"
  7    xmlns:samp1="http://sample1"
  8    version="1.0">
  9    <import namespace="http://sample1" schemaLocation="http://sample1.xsd"/>
10    <simpleType name="departmentIdType">
11     <restriction base="integer">
12      <enumeration value="10"/>
13      <enumeration value="20"/>
14      <enumeration value="30"/>
15      <enumeration value="40"/>
16     </restriction>
17    </simpleType>
18    <element name="company">
19    <complexType>
20    <sequence>
21     <element name="department">
22      <complexType>
23       <sequence>
24        <element name = "id"   type = "samp2:departmentIdType"/>
25        <element name = "name" type = "string"/>
26       </sequence>
27      </complexType>
28     </element>
29    </sequence>
30    </complexType>
31    </element>
32  </schema>',
33   TRUE, TRUE, FALSE, FALSE);
34  end;
35  /
PL/SQL procedure successfully completed.
SQL>