Description of log file contents

[Alex]

Hi,
I would figure this is a FAQ, but I can't find it. My apologies if I
somehow missed searching properly.

Where can I find a description of what the variables at the end of the
line in the query log mean? For example:

14-Apr-2011 17:27:54.277 queries: client 67.210.0.112#17930: query:
ns1.colo.com IN AAAA -E
14-Apr-2011 17:27:55.061 queries: client 98.139.193.153#54962: query:
cape.com IN MX -E
14-Apr-2011 17:27:55.160 queries: client 202.160.178.228#45211: query:
www.call-anyone.com IN A -
14-Apr-2011 17:27:55.317 queries: client 69.162.74.234#6673: query:
mydomain.net IN ANY +
14-Apr-2011 17:27:55.766 queries: client 63.230.177.41#20138: query:
ns.mydomain.com IN A -E
14-Apr-2011 17:27:55.818 queries: client 131.167.253.42#50026: query:
102.96/28.188.104.66.in-addr.arpa IN PTR -

I understand the "A" and "IN", of course, but what is -E and just + and - ?

Does it have to do with whether it was found in the cache?

Thanks,
Alex