GS1 EPC Tag Data Standard 1.6 - Indicod-Ecr

EPC = urn:epc:id:sgtin:0614141.012345.62852(10cc Syringe #62852 – trade item)EPC = urn:epc:id:grai:0614141.54321.2528(Pharma Tote #2528 – reusable asset)EPCs:All physical objectsEstablishes the context as all physical objectsTherefore, any EPC could go here605606607608609610611612613614615616617618619620621622urn:epc:id:sgtin:0614141.012345.62852urn:epc:id:grai:0614141.54321.2528…Figure 4. Illustration of EPC Identifier NamespaceIn contrast, the EPC namespace is a space of identifiers for any physical object. The setof EPCs can be thought of as identifiers for the members of the set “all physical objects.”EPCs are used in contexts where any type of physical object may appear, such as in theset of observations arising in the hospital storage room example above. Note that theEPC URI as illustrated in Figure 4 includes strings such as sgtin, grai, and so on aspart of the EPC URI identifier. This is in contrast to GS1 Keys, where no such indicationis part of the key itself (instead, this is indicated outside of the key, such as in the XMLelement name in the example in Figure 3, or in the Application Identifier (AI)that accompanies a GS1 Key in a GS1 Element String).4.3 Relationship Between EPCs and GS1 KeysThere is a well-defined relationship between EPCs and GS1 keys. For each GS1 key thatdenotes an individual physical object (as opposed to a class), there is a correspondingEPC. This correspondence is formally defined by conversion rules specified in Section 7,which define how to map a GS1 key to the corresponding EPC value and vice versa. Thewell-defined correspondence between GS1 keys and EPCs allows for seamless migrationof data between GS1 key and EPC contexts as necessary.Copyright ©2005- 2011 GS1 AISBL, All Rights Reserved. Page 22 of 218