<s>
Web	B-Application
log	I-Application
analysis	I-Application
software	I-Application
(	O
also	O
called	O
a	O
web	O
log	O
analyzer	O
)	O
is	O
a	O
kind	O
of	O
web	O
analytics	O
software	O
that	O
parses	O
a	O
server	B-Application
log	I-Application
file	I-Application
from	O
a	O
web	B-Application
server	I-Application
,	O
and	O
based	O
on	O
the	O
values	O
contained	O
in	O
the	O
log	O
file	O
,	O
derives	O
indicators	O
about	O
when	O
,	O
how	O
,	O
and	O
by	O
whom	O
a	O
web	B-Application
server	I-Application
is	O
visited	O
.	O
</s>
<s>
Features	O
supported	O
by	O
log	O
analysis	O
packages	O
may	O
include	O
"	O
hit	B-Application
filters	I-Application
"	O
,	O
which	O
use	O
pattern	O
matching	O
to	O
examine	O
selected	O
log	O
data	O
.	O
</s>
