Milestone XProtect Advanced VMS 2014 Manuel d'utilisateur télécharger pdf (Page 170)

Milestone XProtect

Advanced

VMS 2014

Administrator's Manual

www.milestonesys.com

170

Management Client elements

Expression

Expression that the system should look out for when analyzing data

packages. You can use the following operators:

 ( ): Used to ensure that related terms are processed together

as a logical unit. They can be used to force a certain processing

order in the analysis.

Example: The search criteria "(User001 OR Door053) AND

Sunday" first processes the two terms inside the parenthesis, then

combines the result with the last part of the string. So, the system

first looks for any packages containing either of the terms User001

or Door053, then takes the results and run through them in order to

see which packages also contain the term Sunday.

 AND: With an AND operator, you specify that the terms on both

sides of the AND operator must be present.

Example: The search criteria "User001 AND Door053 AND

Sunday" returns a result only if the terms User001 , Door053 and

Sunday are all included in your expression. It is not enough for only

one or two of the terms to be present. The more terms you combine

with AND, the fewer results you retrieve.

 OR: With an OR operator, you specify that either one or

another term must be present.

Example: The search criteria "User001 OR Door053 OR Sunday"

returns any results containing either User001, Door053 or Sunday.

The more terms you combine with OR, the more results you

retrieve.

Expression type

Indicates how particular the system should be when analyzing

received data packages. The options are the following:

 Search: In order for the event to occur, the received data

package must contain the text specified in the Expression:

field, but may also have more content.

Example: If you have specified that the received package

should contain the terms User001 and Door053, the event is

triggered if the received package contains the terms User001

and Door053 and Sunday since your two required terms are

contained in the received package.

 Match: In order for the event to occur, the received data

package must contain exactly the text specified in the

Expression: field, and nothing else.

 Regular expression: In order for the event to occur, the text

specified in the Expression: field must identify specific patterns

in the received data packages.

If you switch from Search: or Match: to Regular expression:, the

text in the Expression: field is automatically translated to a regular

expression.

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Milestone XProtect Advanced VMS 2014 Manuel d'utilisateur Page 170

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