Validating against an XSD

Question

I'm trying to validate an imported XML file (in a clob) against an XSD. It is slightly complicated in that the XSD import another. I have tried to register both, using dbms_xmlschema.registerSchema, but the second one gets:
ORA-01031: insufficient privileges
ORA-06512: at "XDB.DBMS_XDBZ0", line 275
ORA-06512: at "XDB.DBMS_XDBZ", line 7
ORA-06512: at line 1
ORA-06512: at "XDB.DBMS_XMLSCHEMA_INT", line 37
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 61
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 126
ORA-06512: at line 25
I've not found much information on this topic. Any ideas?
I have a supplemental question. This file is being parsed using XMLDOM. Is there a way to extract an element and its contents as a piece of XML text that I can include in an error log?
Thanks
Steve

Answer 1

Now I remember why we switched to using XMLTYPE when extracting information from the XML in PL/SQL.
declare
  l_main_doc    dbms_xmldom.DOMDocument;
  l_main_xml    XMLTYPE;
  l_output      VARCHAR2(500);
  l_clob        CLOB := 'a';
  l_sample      VARCHAR2(500);
  l_nodelist dbms_xmldom.domnodelist;
begin
  l_sample := '<Block>
<Item><Record>1</Record><Value>123</Value></Item>
<Item><Record>2</Record><Value>999</Value></Item>
</Block>';
  -- DOMDoc way
  l_main_doc := dbms_xmldom.newDOMDocument(l_sample);
  l_nodelist := dbms_xslprocessor.selectnodes(dbms_xmldom.makenode(l_main_doc),
                                              '/Block/Item[Record="2"]');
  dbms_xmldom.writeToClob(dbms_xmldom.item(l_nodelist,0),l_clob);
  dbms_output.put_line('#1');
  dbms_output.put_line(l_clob);
  dbms_xmldom.freeDocument(l_main_doc);
  -- XMLType way
  l_main_xml := XMLTYPE(l_sample);
  l_output := l_main_xml.extract('/Block/Item[Record="2"]').getStringVal();
  dbms_output.put_line('#2');
  dbms_output.put_line(l_output);
end;outputs
#1
<Item>
  <Record>2</Record>
  <Value>999</Value>
</Item>
#2
<Item>
  <Record>2</Record>
  <Value>999</Value>
</Item>