Fields; Formulas - IDTECH MINIMAG User Manual

Fields

By separating the input data record into smaller blocks (called "fields"),
each block can be edited individually. Additional fields can also be
added to the record, allowing specific functions, such as carriage
returns or keyboard function keys, to be inserted at any point. (The
field standards for ISO Credit Cards, California driver's licenses, and
AAMVA driver's licenses are listed in Appendix D.)
By separating the input data record into smaller blocks (fields), each
block can then be treated individually. Additional fields can also be
added to the record in any position, allowing specific functions, such as
carriage returns. Fields are identified by a one-character ID starting
with the character "a," up to and including "z," in the order they were
created, allowing as many as 26 fields to be defined. These fields are
then sent to the host in the order which the user specifies. For ex-
ample, if the input data record is in the Credit Card Format for Track 2:
;1234567890123456=9912xxxxxxx?c
Field ID |a| b |c| d |
and your application software is looking for the data to be in the
following format:
9912<ENTER>
1234567890123456<ENTER>
then we must divide the data record into fields, select only those fields
desired, reverse the order in which they are sent to the host, and create
a new field <ENTER> and insert it after each field.
We do this by using the defined fields and adding a new field:
Field b = 1234567890123456
Field d = 9912
Field h = <ENTER>
and sending {Field d} {Field h} {Field b} {Field h}
e |f|g|
1 3

Formulas

The set of instructions programmed into the MiniMag to edit data is
referred to as the data editing "formula." More than one formula
(to a maximum of four) can be resident in the reader at one time.
If more than one formula resides in memory, the reader will apply
the first formula to the input data. If the scanned data matches the
format (credit card, driver's license, etc.) of the first formula, then
it will apply the data editing functions and output the reformatted
data to the host.
If the data does not match the criteria spelled out in the first
formula, then the criteria of the second formula is applied. This
process continues for each of the successive formulas until a
match is found. If no matches are found to any of the formulas
programmed into the reader, then either nothing will be transmitted
to the host, or the unedited data record will be transmitted, accord-
ing to the data editing matched flag, whether set or not.
The MiniMag supports four kinds of formulas: credit card, California
driver's license, and AAMVA formats, as well as a customized format.
The user can define all four, or only one at a time. However, the
MiniMag can only keep one credit card, one California driver's license,
one AAMVA, and one customized format at a time.
1 4