excludes, includes and other tables
 

Hi all!
I am studing phpDig code now and I have some questions about subj:

- what functions at tables excludes and includes?
- there are l_includes and l_excludes fields in table log, l_includes as I understand search string, but what means l_excludes?
- pls explain me differ between upddate and last_modified fileds in table spider

Thanks in advance!

P.S. Sorry for bad english