Page 289 - Automated Fingerprint Identification Systems (AFIS)

274 AUTOMATED FINGERPRINT IDENTIFICATION SYSTEMS

4. DEMONSTRATION TEST MESSAGES

We selected the following series of test messages, called Types of Transactions
or TOTs, to include in our demonstrations. Our goal was not to be all encom-
passing, but to select a sampling that would be easily achievable and relevant
to “real life” scenarios. We used Type-1, Type-2 and Type-4 records. A Type-1
record, mandatory for all transactions, provides information describing type
and purpose of the transaction. A Type-2 record provides biographic and demo-
graphic details about an individual or an error message. Each Type-4 record
contains a fingerprint image.

4.1. TOA/ATR

The Type of AFIS transaction (TOA) requests the make and model of the AFIS
system, TOTs supported, maximum score obtainable, and response time. The
AFIS Type Record (ATR) contains the response to the information requested
in the TOA. These are two new messages devised by the AFIS Committee specifi-
cally for cross-jurisdictional use.

4.2. TPIS/SRT

The most relevant of the tests, the Tenprint Image Search (TPIS) AFIS trans-
action allows a PD to remotely search another jurisdiction’s AFIS remotely with
no manual intervention at the receiving site. The originating PD sends finger-
print images in a TPIS with descriptive data, the remote end automatically
searches and responds with a Search Results—Tenprint (SRT) transaction. The
SRT includes a candidate list with images of the top candidate.

4.3. IRQ/IRR

The Fingerprint Image Request (IRQ) transaction allows the receiver of the
SRT to request fingerprint images for other candidates from the candidate list.
The remote site responds with a Fingerprint Image Request Response (IRR)
which provides the requested fingerprint images.

4.4. LFIQ/SRL
The Latent Fingerprint Image Request (LFIQ) allows the originator to send a
latent image to a destination site. The destination site must edit the minutiae,
then submit the request for processing in the destination AFIS. The destina-
tion AFIS returns the candidate list along with the image of the top candidate