Synopsis

Tag Data Translation implemented according to the GS1 EPC Tag Data Translation 1.6 specification (http://www.gs1.org/epc/tag-data-translation-standard) for RAIN RFID, and updated for Tag Data Standard 1.11. Comes with unit tests and a demonstration application. Online accessible at https://www.mimasu.nl/tdt.

An online demo is available at https://www.mimasu.nl.

The following schemes are supported:

• ADI-var
• CPI-96, CPI-var
• GTDI-96, GDTI-174
• GIAI-96, GIAI-202
• GID-96
• GRAI-96, GRAI-170
• GSRN-96
• GSRNP-96
• ITIP-110, ITIP-212
• SGCN-96
• SGLN-96, SGLN-195
• SGTIN-96, SGTIN-198
• SSCC-96
• USDOD-96

The following programming languages are supported:

• C# .NET Framework 4.0 (Microsoft and Xamarin Mono runtime)
• C# .NET Standard 1.4

Example

The following code is an example on how to use the library, to go from a GTIN and serial to hexadecimal.

TDTEngine engine = new TDTEngine ();
string epcIdentifier = @"gtin=00037000302414;serial=10419703"
string parameterList = @"filter=3;gs1companyprefixlength=7;tagLength=96";
string binary = engine.Translate(epcIdentifier, parameterList, @"BINARY");
string binaryHex = engine.BinaryToHex(binary);

Or the other way around.

TDTEngine engine = new TDTEngine ();
string epcIdentifier = engine.HexToBinary(@"30340242201d8840009efdf7");
string parameterList = @"tagLength=96";
string legacy = engine.Translate(epcIdentifier, parameterList, @"LEGACY");

API

The library follows the client API as defined in the standard and there are some additional helper functions.

Translate

public String translate(String epcIdentifier, String parameterList, String outputFormat)

Translates epcIdentifier from one representation into another within the same coding scheme.

Parameters

Parameter	Description
epcIdentifier	The epcIdentifier to be converted. This should be expressed as a string, in accordance with one of the grammars or patterns in the TDT markup files, i.e. a binary string consisting of characters '0' and '1', a URI (either tag-encoding or pure-identity formats), or a serialized identifier expressed as in Table 3.
parameterList	This is a parameter string containing key value pairs, using the semicolon [';'] as delimiter between key=value pairs. For example, to convert a GTIN code the parameter string would look like the following: filter=3;companyprefixlength=7;tagLength=96
outputFormat	The output format into which the epcIdentifier SHALL be converted. The following are the formats supported: BINARY, LEGACY, LEGACY_AI, TAG_ENCODING, PURE_IDENTITY

Returns

The converted value into one of the above formats as String.

Throws

TDTTranslationException – Throws exceptions due to the following reason:

1. TDTFileNotFound Reports if the engine could not locate the configured definition file to compile.
2. TDTFieldBelowMinimum Reports a (numeric) Field that fell below the decimalMinimum value allowed by the TDT markup
3. TDTFieldAboveMaximum Reports a (numeric) Field that exceeded the decimalMaximum value allowed by the TDT markup
4. TDTFieldOutsideCharacterSet Reports a Field containing characters outside the characterSet range allowed by the TDT markup
5. TDTUndefinedField Reports a Field required for the output or an intermediate rule, whose value is undefined
6. TDTSchemeNotFound Reported if no matching Scheme can be found via prefixMatch
7. TDTLevelNotFound Reported if no matching Level can be found via prefixMatch
8. TDTOptionNotFound Reported if no matching Option can be found via the optionKey or via matching the pattern
9. TDTLookupFailed Reported if lookup in an external table failed to provide a value – reports table URI and path expression.
10. TDTNumericOverflow Reported when a numeric overflow occurs when handling numeric values such as serial number.

GetPrefixLength

public PrefixLengthResult GetPrefixLength(string input)

Gets the GS1 Prefix Length for the given identifier. Based on the gcpprefixformatlist.xml file from GS1 (GCP Length Table, https://www.gs1.org/standards/bc-epc-interop).

Parameters

Parameter	Description
input	Identifier for which to find the GS1 Prefix Length. Input as string.

Returns

An object with the following properties.

Property	Description
Prefix	The full GS1 Prefix as a string.
Length	The length of the GS1 Prefix as integer.

GetFilterValueTable

public Dictionary<int, string> GetFilterValueTable(string scheme)

Gets the Filter Value table for the provided scheme.

Parameters

Parameter	Description
scheme	The GS1 EPC scheme for which to retrieve the Filter Value Table. Input as string.

Returns

A dictionary with an integer as key (Filter Value) and a string as value (description).

License

This library is dual-licensed:

• GNU Affero General Public License version 3
• Commercial license, contact [email protected] for more details

The included XML and XSD artifacts are (c) by GS1 (https://www.gs1.org/epc/tag-data-translation-standard).