Skip to Main Content
RFID Essentials
book

RFID Essentials

by Bill Glover, Himanshu Bhatt
January 2006
Intermediate to advanced content levelIntermediate to advanced
278 pages
12h 2m
English
O'Reilly Media, Inc.
Content preview from RFID Essentials
TAG PROTOCOLS 83
written into a tag’s memory, or physically realized through some other technology.
Figure 4-3 gives an example of encoding a pure identity as a bar code or an EPC tag.
Notice that the GID is used as the fundamental encoding for EPC tags. Other encodings
take an identity, which might be encoded in another form (such as a bar code), and con-
vert it to a form that fits into a GID with a syntax similar to “Header.GeneralManager-
Number.ObjectClass.SerialNumber.” This requires the EPC to take some liberties with the
GS1 SGTIN. For example, while the guidance from GS1 is that the GTIN should never be
parsed and treated as separate fields, an EPC must have a General Manager Number and
an Object Class for the Object Naming Service (ONS) to work, so the EPC-SGTIN divides
the GTIN. In this case, an SGTIN is an example of a pure identity. The EPC-SGTIN is the
encoding, and the bits on an EPC tag representing the EPC-SGTIN are the physical realiza-
tion of that encoding.
GS1 SGTIN Encoding
EPC readers and RFID middleware present tag data according to its EPC encoding. Inter-
facing with a reader or middleware requires at least a cursory understanding of tag encod-
ings for debugging code. An understanding of these encodings is also required to define
the events and filters introduced in Chapter 2, which we will describe in more detail in
Chapters 6 and 7. The SGTIN is a good example of an ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

RFID Security

RFID Security

Frank Thornton, Chris Lanthem
Advanced Chipless RFID

Advanced Chipless RFID

Nemai Chandra Karmakar, Mohammad Zomorrodi, Chamath Divarathne
RFID For Dummies®

RFID For Dummies®

Patrick J. Sweeney II

Publisher Resources

ISBN: 0596009445Catalog PageErrata