Application Development Software

I am interested in using IFS as a way to load documents
(PDF, HTML, RFT, text...) in an Oracle database table, and
then access the table via a regular application Server.

I understand that the right way to do this is via a Java API
mapped on top of IFS.

But we already have a fairly sophisticated web application using
Java and PL/SQL procedures so that I would ideally need
to write a PL/SQL procedure such as :
function get_document (ifs_file_name in varchar, ifs_file_path in varchar) return clob

For this I need to outline how to query the IFS schema using SQL.

Any idea which table to query ?

Have a nice day