Information & Database System Laboratory

EPCglobal Tag Data TranslationEPCglobal Tag Data Translation

- RFID Team -

2007. 04. 27컴퓨터멀티미디어공학과

김성진

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Contents

Tag Data Translation (TDT) TDT Concept TDT Process TDT Process step Tag Data Standards TDT Markup API Examples

SGTIN-96 ( Legacy -> Pure Identity )

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TDT Concept

The Tag Data Translation process translates one representation of

EPC into another representation, within a particular coding scheme.

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TDT Process (1)

The fundamental concept of TDT is to automatically convert one

representation of an EPC or a serialized legacy code and convert it

into another representation as required.

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TDT Process (2)

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TDT Process (3)

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TDT Process step (1)

There are five fundamental steps to a translation 1. Use of the prefix matches and regular expression patterns to automatically

detect the inbound representation and coding scheme of the supplied input value 2. Using the regular expression pattern to extract values of field from the input

value 3. Manipulation of values of those fields in order to translate from the inbound

representation to the outbound representation 4. Using the rules to calculate any additional fields required for the output 5. Using the ABNF grammar to format the required fields in the appropriate output

representation

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TDT Process step (2)

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Tag Data Standards

EPC Tag Data Standards specifications GID ( General Identifier ) SGTIN ( Serialized Global Trade Item Number ) SSCC ( Serial Shipping Container Code ) SGLN ( Serialized Global Location Number ) GRAI ( Global Returnable Asset Identifier ) GIAI ( Global Individual Asset Identifier ) DOD ( Department Of Defense )

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TDT Markup (1)

The key elements of the TDT markup

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TDT Markup (2)

TDT Markup used… Definition of Formats via Regular Expression Patterns and ABNF Grammar Determination of the inbound representation Specification of the outbound representation Specifying supplied parameter values Validation of values for fields and fields derived via rules Restricting and checking decimal ranges for values of fields Restricting and checking character ranges for values of fields Padding of fields Compaction and Compression of fields Names of fields used within the TDSv1.1r1.27 schemes Rules and Derived Fields Core Functions

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API

API Essentially two interfaces to consider for TDT software, Namely a client-side interface and maintenance interface

Client API public String translate( String epcIdentifier, String parameterList,

String outputFormat ) Throws : TDTFileNotFound, TDTFieldBelowMinimum etc.

Maintenance API public void refreshTranslations()

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Examples (1)

SGTIN-96 ( Legacy -> Pure Identity ) SGTIN-96 Legacy Level grammar

“’gtin=‘ indicatordigit companyprefix itemrefremainder checkdigit ‘;serial=‘ serial”

Ex) gtin=00037000302414;serial=10419703

SGTIN-96 Pure Identity Level grammar “’urn:epc:id:sgtin:’ companyprefix ‘.’ itemref ‘.’ serial” Ex) urn:epc:id:sgtin:0037000.030241.10419703

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Examples (2)

SGTIN-96 Rules ( EXTRACT and FORMAT ) EXTRACT

gtinprefixremainder <- SUBSTR( gtin, 1, 12 ) indicatordigit <- SUBSTR( gtin, 0, 1 ) itemrefremainder <- SUBSTR( gtinprefixremainder, companyprefixlengt

h ) itemref <- CONCAT( indicatordigit, itemrefremainder ) companyprefix <- SUBSTR( gtinprefixremainder, 0, companyprefixlengt

h ) FORMAT

indicatordigit <- SUBSTR( itemref, 0, 1 ) itemrefremainder <- SUBSTR( itemref, 1 ) gtinprefix <- CONCAT( indicatordigit, companyprefix, itemrefremainder) checkdigit <- GS1CHECKSUM( gtinprefix )

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Examples (3)

Translation Process (1) Input : “gtin=00037000302414;serial=10419703” (SGTIN-96 Le

gacy) ParamList : “filter=0;companyprefixlength=7;taglength=96” Output : “PURE IDENTITY”

ex) translate( Input, ParamList, Output );

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Examples (4)

Translation Process (2) 1. Read and parse the supplied parameters to extract the value

( filter = 0, companyprefix = 7, taglength = 96 )

2. Detect the input scheme and level from the input value ( SGTIN-96 scheme and Legacy level )

3. Determine the appropriate option by pattern matching on the input value or filter value ( option 12 )

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Examples (5)

Translation Process (3) 4. Run the sequence of rules denoted ‘EXTRACT’ for the inbound le

vel gtinprefixremainder = SUBSTR(gtin, 1, 12 ) = 003700030241 indicatordigit = SUBSTR(gtin, 0, 1 ) = 0 itemrefremainder = SUBSTR(gtinprefixremainder, 7) = 30241 itemref = CONCAT(indicatordigit, itemrefremainder) = 030241 companyprefix = SUBSTR(gtinprefixremainder, 0, companyprefixlength) = 0037

000

5. If the appropriate option is unknown, it should now be possible to set this from the definition of ‘optionkey’ and the values from the ‘extract’ definitions We selected option already.

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Examples (6)

Translation Process (4) 6. Determine the non-binary encoding for each field from

the compaction attribute of the field elements and convert between binary, decimal, alphanumeric, ASCII etc. as required do not needed in this example

7. Run the sequence of rules denoted ‘format’ for the outbound level do not needed in this example

8. Format the outbound representation and return this urn:epc:id:sgtin:0037000.030241.10419703

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수고하셨습니다 .