In order to use DNS to ?¬?nd information about an item, the EPC is converted to its pure
identity URI form as de?¬?ned by the EPCglobal Tag Data Standard (EPCglobal, 2006a).
Since ONS contains pointers to services, it uses the Naming Authority Pointer (or NAPTR)
DNS record type. The ONS speci?¬?cation consists of
. A procedure that an ONS Client must follow to present a query to ONS, DNS
NAPTR query
. A set of rules that ONS Publishers must follow to represent pointers to services for
EPCs as DNS NAPTR records
. A procedure that an ONS Client must follow to interpret the results of an ONS
query
2.13 Drug Pedigree Standard
The Drug Pedigree Standard (EPCglobal, 2007c) speci?¬?es an architecture for the exchange
of electronic pedigree documents for use by pharmaceutical supply chain participants, and
is targeted for use in complying with document-based pedigree laws. A pedigree is a
certi?¬?ed record that contains information about each distribution of a prescription drug,
such as the sale of an item by a pharmaceutical manufacturer, any acquisitions and sales by
wholesalers or repackagers, and ?¬?nal sale to a pharmacy or other entity administering or
dispensing the drug. The pedigree contains product information, transaction information,
distributor information, recipient information, and signatures. The digital signature process
conforms to the X.
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