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Copyright ©2006-2009 EPCglobal
®
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EPCglobal Tag Data Translation (TDT) 1.4
Ratified Standard
June 10, 2009
Latest version: 1.4
Previous versions: 1.0
Disclaimer
EPCglobal Inc™ is providing this document as a service to interested industries.
This document was developed through a consensus process of interested
parties.
Although efforts have been to assure that the document is correct, reliable, and
technically accurate, EPCglobal Inc. makes NO WARRANTY, EXPRESS OR
IMPLIED, THAT THIS DOCUMENT IS CORRECT, WILL NOT REQUIRE
MODIFICATION AS EXPERIENCE AND TECHNOLOGICAL ADVANCES
DICTATE, OR WILL BE SUITABLE FOR ANY PURPOSE OR WORKABLE IN
ANY APPLICATION, OR OTHERWISE. Use of this document is with the
understanding that EPCglobal Inc. has no liability for any claim to the contrary, or
for any damage or loss of any kind or nature.
Copyright notice 22
© 2006, 2007, 2008, 2009 EPCglobal Inc. 23
All rights reserved. Unauthorized reproduction, modification, and/or use of this document is not 24
permitted. Requests for permission to reproduce should be addressed to 25
epcglobal@epcglobalinc.org. 26
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EPCglobal Inc.
TM
is providing this document as a service to interested industries. This 28
document was developed through a consensus process of interested parties. Although efforts 29
have been to assure that the document is correct, reliable, and technically accurate, EPCglobal 30
Inc. makes NO WARRANTY, EXPRESS OR IMPLIED, THAT THIS DOCUMENT IS 31
CORRECT, WILL NOT REQUIRE MODIFICATION AS EXPERIENCE AND TECHNOLOGICAL 32
ADVANCES DICTATE, OR WILL BE SUITABLE FOR ANY PURPOSE OR WORKABLE IN 33
ANY APPLICATION, OR OTHERWISE. Use of this Document is with the understanding that 34
EPCglobal Inc. has no liability for any claim to the contrary, or for any damage or loss of any 35
kind or nature 36
Copyright ©2006-2009 EPCglobal
®
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Table of Contents
Terminology ........................................................................................................ 5
Status of this document ..................................................................................... 5
Changes from previous versions ...................................................................... 5
1 Introduction ................................................................................................... 6
1.1 Overview ................................................................................................... 6
1.2
Tag Data Translation Charter .................................................................... 7
1.3
Tag Data Translation Concept .................................................................. 7
1.4 Role within the EPC Network Architecture ................................................ 9
1.5 Tag Data Translation Process ................................................................. 12
1.6 Expressing different representations of EPC .......................................... 15
Patterns (Regular Expressions) .................................................................................... 15
Grammar (Augmented Backus-Naur Form [ABNF]) ..................................................... 15
Rules for obtaining additional fields .............................................................................. 15
1.7 Translation Process Steps ...................................................................... 16
2 Tag Data Standards .................................................................................... 17
2.1 Overview ................................................................................................. 17
2.2 Many Schemes, 4 Levels within each scheme and multiple options for
each level ............................................................................................... 19
3 TDT Markup and Logical Process ............................................................. 21
3.1
TDT Master Index file .............................................................................. 21
3.2 TDT Markup ............................................................................................ 22
3.3 Definition of Formats via Regular Expression Patterns and ABNF
Grammar ................................................................................................ 24
3.4 Determination of the inbound representation .......................................... 25
3.5
Specification of the outbound representation .......................................... 25
3.6 Specifying supplied parameter values .................................................... 26
3.7 Validation of values for fields and fields derived via rules ....................... 27
3.8 Restricting and checking decimal ranges for values of fields .................. 28
3.9
Restricting and checking character ranges for values of fields ............... 28
3.10
Padding of fields ...................................................................................... 29
Copyright ©2006-2009 EPCglobal
®
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Changes since TDT v1.0 2969
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padChar and padDir ..................................................................................................... 31
bitPadDir and bitLength .................................................................................................... 32
3.10 Summary of padding rules .................................................................. 32
3.11 Compaction and Compression of fields ................................................. 36
3.12 Names of fields used within the TDSv1.4 schemes ............................... 37
3.13 Rules and Derived Fields ....................................................................... 38
3.14 Core Functions ...................................................................................... 39
4 TDT Markup - Elements and Attributes ..................................................... 44
4.1 Root Element .......................................................................................... 44
Attributes .......................................................................................................................... 44
Elements .......................................................................................................................... 44
4.2 Scheme Element ..................................................................................... 44
Attributes .......................................................................................................................... 44
Elements .......................................................................................................................... 44
4.3 Level Element ......................................................................................... 45
Attributes .......................................................................................................................... 45
Elements .......................................................................................................................... 46
4.4 Option Element ....................................................................................... 46
Attributes .......................................................................................................................... 46
Elements .......................................................................................................................... 46
4.5 Field Element .......................................................................................... 47
4.6
Attributes ................................................................................................. 47
4.7 Rule Element .......................................................................................... 48
Attributes .......................................................................................................................... 48
5
Translation Process .................................................................................... 50
5.1
Tag Data Translation Software - Reference Implementation .................. 52
6 Application Programming Interface .......................................................... 52
6.1
Client API ................................................................................................ 53
6.2 Maintenance API ..................................................................................... 54
7 TDT Schema and Markup Definition .......................................................... 55
8 Glossary (non-normative) .......................................................................... 56
9
References ................................................................................................... 63
Copyright ©2006-2009 EPCglobal
®
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Terminology 105
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Within this specification, the terms SHALL, SHALL NOT, SHOULD, SHOULD NOT,
MAY, NEED NOT, CAN, and CANNOT are to be interpreted as specified in Annex G of
the ISO/IEC Directives, Part 2, 2001, 4th edition [ISODir2]. When used in this way,
these terms will always be shown in ALL CAPS; when these words appear in ordinary
typeface they are intended to have their ordinary English meaning.
The Courier font is used to indicate the names of XML elements and attributes and
names of variable fields within the Tag Data Translation markup.
All sections of this document are normative, except where explicitly noted as non-
normative.
Status of this document
This section describes the status of this document at the time of its publication within the
Working Group, Technical and Business Steering Committees and the EPCglobal Board.
This document has completed all the required EPCglobal Standards Development Process
steps and it has been fully ratified by the EPCglobal Board on June 10
th
, 2009.
Comments on this document should be sent to the attention of EPCglobal Software
Action Group Reader Operations Working Group using the following email address:
epcinchelp@epcglobalinc.org. 122
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Changes from previous versions
This version of the specification supports the latest TDS version 1.4. The following
changes are made to this specification:
• Modified tagLength attribute in schema definition to remove tagLength restriction
(EpcTagDataTranslation.xsd)
• Added three new schema definition to support GSRN-96, GDTI-96 and GDTI-
113
• Added example string format for GSRN and GDTI in Table 3
• Added bidPadDir attribute to the schema definition to specify padding direction
for binay output. Added bitPadDir description to section 3.10 (Padding of fields)
and replace existing table in this section with flow chart to provide more clarity
• Added toDate function to the schema definition to support date arithimetic and
added this function to section 3.14 (Core Function)
• Added table entry for bitPadDir to section 4.6 (Attributes)
• Added GSRN and GDTI to section 9 (Glossary)
• Added GSRN and GDTI to the section 10 (References)
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