JDeveloper, Java & XML :: Writing XML To Oracle Directory

I have the following tables & data ..

create table identity (IDENTITY_ID varchar2(100));

Insert into identity values ('100');
Insert into identity values ('101');

create table CM_ENCOUNTER (IDENTITY_ID varchar2(100), CSN varchar2(100));

Insert into CM_ENCOUNTER values ('100','3a1');
Insert into CM_ENCOUNTER values ('101','1a2');

create table CM_PATIENT (IDENTITY_ID varchar2(100), GENDER varchar2(100), race varchar2(100));

Insert into CM_PATIENT values ('100','F','AA');
Insert into CM_PATIENT values ('101','M','HA');
Insert into CM_PATIENT values ('101','F','EA');

create table CM_ENCOUNTER_RFV
(IDENTITY_ID varchar2(100), CSN_ID varchar2(100), LINE varchar2(100), ENC_REASON_NAME varchar2(100));
Insert into CM_ENCOUNTER_RFV values ('100','23vx','2', 'phone');
commmit;

The output needed is :

<EvaluatePatient>
<PatientInformation>
<Patient>
<mrn>100</mrn>
<CSN>3a1</CSN>
[code]......

Based on the above, I created a table (which is of xml) ...

Create table temp_xml
as
Select XMLELEMENT("PatientInformation",(XMLELEMENT("Patient",
XMLELEMENT("mrn", s.identity_id),
XMLELEMENT("CSN", m.csn),
XMLELEMENT("Gender", p.gender),
[code]........

Now, I need to write each record into xml file. So, I used the below to write into file..but it gives me an error...wrong number of arguments to utl_file at line 14.

DECLARE
CURSOR c_data IS
SELECT * from temp_xml;
v_file UTL_FILE.FILE_TYPE;
BEGIN
[code]..........