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<< Click to Display Table of Contents >> Filter expressions |
  
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<< Click to Display Table of Contents >> Filter expressions |
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A filter expression that is empty will of course have no effect. It must contain at least one variable to be useful.
Please note, that even if you have specified multiple conditions, it is not necessary to include all of them in the filter expression at all times. You can remove a variable from the filter expression and leave the associated condition unused, to be able to easily reuse it, at a later time.
The simplest possible filter expression contains one single variable, for example:
V1
More complex filter expressions include a combination of multiple variables, the operators AND and OR, and parenthesis, like for instance:
(V1/V2)&V3
Please refer to the subtopics that are listed below for detailed explanations of the operators.
•AND
•OR
•NOT
An incorrectly specified filter expression, one that is erroneous, will have the same effect as an empty filer expression. That means that such an expression will not deselect any files, and only the File selection or the Manual selection will apply.
Example of an incorrect filter expression (the right parenthesis is missing):
(V1&V2
With the Validate button to the right of the current filter expression, you can test that it works as you intend it to. That process is described in a separate sub-topic listed below.