Keri Systems Doors16 - Manual (Page 159)

Keri Systems, Inc. Doors™ Users Guide
01821-001 October 1998
Revision 2.1 Page 159
Figure 148 – Less Than Criterion Sample
Not Equal To operator (<>)
As a report is being generated, a search expression using the Not Equal To operator examines
each data string in the event database, searching for data strings that meet the search
expression’s Field Type.
If the Field Type is a match, the Field Value in the data string is then compared with the Field
Value in the search expression. If the value in the data string is not equal to the value in the
expression, the data string is included in the report; if not, it is excluded from the report.
For example, if the Field Type is set to Date (TIMEDATE) and the Field Value is set to 07/
04/1997, the report would only include events that did not occurred on July 4, 1997. Events
that occurred on July 4, 1997 would be excluded from the report (see Figure 149).
Figure 149 – Not Equal To Criterion Sample
Boolean Links
Boolean links are used to link simple expressions together to create complex expressions
where several conditions must be met before data should be included in a report. Since a link
cannot be done until there are at least two expressions, the link field does not become active
until at least one expression has been entered into the Search Expression field. There are three
types of links.
• AND
• OR
• NOT
AND
An AND link allows operator to link two search expressions together so that as event data is
being reviewed for a report the data must meet the criteria in both expressions to be included
in the report.
For example, an AND link consisting of TIMEDATE=07/04/1997 AND EVENT=Access
Denied would filter event data and create a report that displays only the Access Denied events
that occurred on July 4, 1997.
OR
An OR link allows operator to link two search expressions together so that as event data is
being reviewed for a report the data must meet the criteria in either expression to be included
in the report.
For example, an OR link consisting of TIMEDATE=12/24/1997 AND TIMEDATE=12/25/
1997 would filter event data and create a report that displays all events that occurred on either
December 24, 1997 or December 25, 1997.