XML document in CLOB with reference to external DTD

Question

If you place the xml document in clob using dbms_lob and the document has reference to external (system) DTD then it gives an error 'Error opening external DTD'. Whats the work around. See example below...
declare
xmlstring CLOB;
xmlstring1 CLOB;
os_file BFILE := bfilename('BFILE_DIR','family.xml');
> > > rowsp INTEGER; > > > errnum NUMBER; > > > errmsg VARCHAR2(2000);
> > > time VARCHAR2(20); > > > begin
> > > select to_char(sysdate,'MM/DD/YYYY HH24:MI:SS')
> > > into time from dual; > > > dbms_output.put_line(time);
> > > dbms_lob.createtemporary(xmlstring, true, > > > dbms_lob.session);
> > > dbms_lob.fileopen(os_file, > > dbms_lob.file_readonly);
> > > dbms_lob.loadfromfile(xmlstring, os_file,
> > > dbms_lob.getlength(os_file));
> > > select to_char(sysdate,'MM/DD/YYYY HH24:MI:SS')
> > > into time from dual; > > > dbms_output.put_line(time);
> > > xmlgen.resetOptions; > > > xmlgen.setRowTag('family');
> > > --xmlgen.setIgnoreTagCase(xmlgen.IGNORE_CASE);
> > > rowsp := xmlgen.insertXML('family',xmlString);
> > > dbms_output.put_line(' Rows processed = '| | > > > TO_CHAR(rowsp));
> > > dbms_lob.freetemporary(xmlstring);
> > > dbms_lob.fileclose(os_file); > > > commit; > > > exception
> > > when no_data_found then > > > rollback;
> > > dbms_lob.freetemporary(xmlstring);
> > > dbms_lob.fileclose(os_file); > > > errnum := abs(SQLCODE);
> > > errmsg := SQLERRM;
> > > dbms_output.put_line(errnum| |'----'| |errmsg); > > > when others then
> > > rollback; > > > dbms_lob.freetemporary(xmlstring);
> > > dbms_lob.fileclose(os_file); > > > errnum := abs(SQLCODE);
> > > errmsg := SQLERRM;
> > > dbms_output.put_line(errnum| |'----'| |errmsg); > > > end;

Answer 1

Can be one of two problems.
One
Your database user does not have
privileges to open a socket inside
the database. This will prevent
the XML parser running inside the DB
from retrieving the DTD which it must
do to properly parse the document.
Two
you are sitting behind a corporate
firewall and need to properly set
the Proxy Server host and port to
properly retrieve the DTD.
From looking at your code it would appear
that your job can more easily be done by
using the OracleXML putXML command line
utility outside the database.
You can specify the -D options to your
JavaVM to set the System properties for
the proxy server if need be like this:
java -DproxySet=true -DproxyHost=yourproxyserver OracleXML putXML