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Restricting Data Types by Character Position
You can create a template to accept only certain types of data
in each character position.
1. Define your text or bar code field on the Format Worksheet
as shown in Chapter 2, "Designing a Format."
When determining the number of characters, allow for
fixed characters, plus all characters to be entered by the
operator.
2. Find Option 3 on the Format Worksheet.
3. Write T in box R3, after 3. Make sure you write the T in
the same row as the text or bar code field to which it
applies.
4. In box R4, after T, define the type of character for each
character position. Use the
character indicators
below.
Indicator Data Type
* any printable character
# any digit 0-9
@ any letter a-z, A-Z
_ no user input for this position
Use the underscore in positions that are fixed with Option
1 or copied into the field with Option 4.
Place quotes around the string of characters, like this:
"***###@@"
This template defines
- any character in positions 1-3
- digits only in positions 4-6
- letters in positions 7 and 8.
Applying Field Options
3. Applying Field Options
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