# there are n number of files to parse
%masterhash = ( %file_1_hash, ..., %file_n_hash);

# within each file hash 
%file_1_hash = (%foo, %foo2);

#within each section
%foo = ( letter => "a", 
         number => "b" );
# %letter would = a 
# %number would = b
... with n number of elements within foohash
 
# same for foo2
%foo2 = ( %letter, %number);
# same as foo

#... Note: n number of sections in each file.