How to populate the Flexmap reference field value in the DFF field?

Hi,

I have seen a number of posts online, regarding the usage of OAF Flexmaps, and the use of it in the DFF Context Reference field.

But, is there a way, where in I can get this :$PROFILES$.<parameter> value populated in the DFF attribute.

I tried, the Constant in the DFF Attribute, and gave the value as :$PROFILES$.LINE_NUM (example - LINE_NUM), and also I tried the Sql Statement - Select :$PROFILES$.LINE_NUM from dual.

But, both didnt work.  The value being populated is :$PROFILES$.LINE_NUM, instead of the value of LINE_NUM from the page.