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Tag-based Identification Services

This page provides information about ongoing work on making a directory service specification for tag-based identification applications. It is proposed as a ITU-T only work item.


This Recommendation provides guidance for providing directory services for tag-based identification applications by reference to the directory capabilities as specified in the ITU-T X.500 Series of Recommendations | ISO/IEC 9594-All Parts and in the Lightweight Directory Access Protocol (LDAP) specifications as developed within Internet Engineering Task Force (IETF). A tag, also called an Automatic Identification and Data Capture (AIDC) media, holds an identifier that identifies the item to which the AIDC media is affixed or associated. The directory may be used to store information associated with the AIDC media for access using the identifier as the argument in a directory retrieval request.

This Recommendation identifies two cases, one case where the identifier is used as a whole to access a centralised directory, and one case where the structure of the identifier is explored to access distributed directory systems, when it is not feasible for a specific environment to hold all relevant information in a single directory. In this latter situation the top-level information could be held by some type of independent service provider, while the company and/or item related information may held by the information owner.

The primary focus is on Radio Frequency Identification (RFID) tags as specified within the GS1 EPCglobal specifications and within ISO and ISO/IEC International Standards.


A link to the current document may be found here.

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