Milestone XProtect Go 2014 - Manual (Page 124)

Milestone XProtect ® Go 2014 Administrator's Manual
www.milestonesys.com 124 Advanced configuration
Name Description
Event message expression
Displays the string which will be used for the actual package
analysis. The field is not directly editable. However, you can
position the cursor inside the field in order to determine where a
new item should be included when you click the Add button or one
of the parenthesis or operator buttons described in the following.
Likewise, you can position the cursor inside the field in order to
determine where an item should be removed when clicking the
Remove button: The item immediately to the left of the cursor will
be removed when you click the Remove button.

(: Lets you add a start parenthesis character to the Event
message expression field. Parentheses can be used to
ensure that related terms are processed together as a
logical unit; in other words, they can be used to force a
certain processing order in the analysis. Example: If using
("User001" OR "Door053") AND "Sunday", the two terms
inside the parenthesis will be processed first, then the result
will be combined with the last part of the string. In other
words, XProtect Go will first look for any packages
containing either of the terms User001 or Door053, then it
will take the results and run through them in order to see
which packages also contain the term Sunday.

): Lets you add an end parenthesis character to the Event
message expression field.

AND: Lets you add an AND operator to the Event message
expression field. With an AND operator, you specify that the
terms on both sides of the AND operator must be present.
Example: If using User001 AND Door053 AND Sunday, the
term User001 as well as the term Door053 as well as the
term Sunday must be present in order for the criterion to be
met. It is not enough for only one or two of the terms to be
present. As a rule of thumb, the more terms you combine
with AND, the fewer results you will retrieve:
Combinations with AND yields few results
(indicated in red)

OR: Lets you add an OR operator to the Event message
expression field. With an OR operator, you specify that
either one or another term must be present. Example: If
using User001 OR Door053 OR Sunday, the term User001
or the term Door053 or the term Sunday must be present in
order for the criterion to be met. The criterion is satisfied
even if only one of the terms is present. As a rule of thumb,
the more terms you combine with OR, the more results you
will retrieve: