XML DB :: Populate Collection Type From XML Type

Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
PL/SQL Release 11.1.0.7.0 - Production
CORE     11.1.0.7.0     Production
TNS for Linux: Version 11.1.0.7.0 - Production
NLSRTL Version 11.1.0.7.0 - Production

I'm new to this XML DB thing and also this is my first post.

I'm trying to populate collection type from XMLType. I was able to populate a table from XMLType but any way to populate the collection type. Here is the description of my problem:

Object Type:
CREATE OR REPLACE TYPE DOC_ROWTYPE AS OBJECT
(
     REFERENCENUMBER VARCHAR2(255),
     REQID NUMBER(12),

[Code]....

Collection Type:

CREATE OR REPLACE TYPE DOC_TABLETYPE IS TABLE OF DOC_ROWTYPE;

I have a physical table which is created when I registered a schema.

A table (Temp_Result) got created with column SYS_NC_ROWINFO$ which is of XMLType.

As you can see this is only a temporary table which will store the response XML which I want to finally get it to collection type.

XML to parse:
<code>
<TFSResponse>
<TFS>
<refNumber>12345</refNumber>
<reqId>123</reqId>

[Code]...

So each object in the collection is one TFS tag. how to implement this?