User's Manual

6 Scanner Support—Chapter
141700 Series Color Mobile Computer User’s Manual
Grid Data Filtering
The virtual wedge retrieves scanned Automatic Data Collection (ADC)
data and sends it to the keypad driver so that the 700 Series Computer can
receive and interpret the data as keypad input. The data can be filtered so
that only data conforming to a certain text pattern or symbology will be
sent to an application. After the data is filtered, it can be edited by adding,
deleting, or rearranging portions of the text or by extracting portions of
text for further editing. To filter and edit data, you need to define the
virtual wedge grid parameters.
S Grid Processing:
Grid processing takes place in two steps:
S Compilation:
In which the user’ s grid expressions are checked for errors and
reduced to a binary form for faster matching. This is done whenever
the virtual wedge grid is set or changed by configuration software.
S Matching:
In which data is tested against the grids set in compilation. Matching
can be performed multiple times after a compilation. The AIM
symbology ID of the data being tested, including the enclosing angle
brackets, must be prepended to the incoming data.
Syntax
The basic syntax of each grid expression is:
<symID> filter-expression= > editing-expression
where:
S symID
Is the AIM symbology ID (see the AIM Symbolog y ID Defaults table
starting on page 219) .
S filterexpression
Is any character string that includes valid filter expression values (see
the “Filter Expression Values” table on the next page).
S editing-expression
Is any character string that includes valid editing expression values (see
the “Editing Expression Values” table on page 144).