[sleuthkit-developers] Explanation for V3 has_layout column of tsk_files table

[Edward D. <eld...@tr...>]

In the explanation for the has_layout column of the tsk_files table for 
the SQLite Database v3 Schema at 
http://wiki.sleuthkit.org/index.php?title=SQLite_Database_v3_Schema I see:

"has_layout - True if file has an entry in tsk_file_layout"

Yet after creating an Sqlite database from an image using version 4.2.0 
of TSK I see in the tsk_files entries for allocated files NULL database 
values, even though all of these files have entries in the 
tsk_file_layout table. In fact only the vast majority of unallocated 
file entries have a value of 1 for this column and no entries have a 
value of 0 for this column.

What is the actual explanation for this column ? Or does the value of 
this column only apply to unallocated file areas ? If the latter is the 
case the explanation in the V3 database should be corrected to say so.