If a session extends from one Web log in to another, the data collected
on that session from the first Web log is incomplete. In this case,
the Clickstream Sessionize transformation cannot determine whether
the session is complete, and the record is marked with a
2 in the
Exit point column field
of the output record. This incomplete session data is held in the
permanent library, which was set in the
Permanent library
path field on the
Options tab
of the Clickstream Sessionize transformation. Once the following day's
data is captured in another Web log, the session data is matched up
and collected. For example, if the cutoff for the Web log is at midnight,
but a user clicks on that Web site from 11:30 p.m. until 12:30 a.m.,
then the session information is contained in two Web logs. The data
from the first day is held in the permanent library as incomplete
until it is matched with the second Web log. This is why it is important
to properly manage the content of the Permanent library path between
runs. See
Best Practices for the Clickstream Sessionize Transformation.