GS1 EPC Tag Data Standard 1.6 - Indicod-Ecr

3265326632673268326932703271327232733274327532763277327832793280328132823283328432853286328732883289329032913292329332943295329632973298329933003301The “application-defined” compaction mode of the No-Directory Access Method is notallowed because it cannot be understood by a receiving system unless both sides have thesame definition of how the compaction works.Note that the Packed Objects Access Method supports the encoding of data either with orwithout a directory-like structure for random access. The fact that the other accessmethod is named “No-Directory” in [ISO15962] should not be taken to imply that thePacked Objects Access Method always includes a directory.18 ConformanceThe EPC Tag Data Standard by its nature has an impact on many parts of the EPCglobalArchitecture Framework. Unlike other standards that define a specific hardware orsoftware interface, the Tag Data Standard defines data formats, along with procedures forconverting between equivalent formats. Both the data formats and the conversionprocedures are employed by a variety of hardware, software, and data components in anygiven system.This section defines what it means to conform to the EPC Tag Data Standard. As notedabove, there are many types of system components that have the potential to conform tovarious parts of the EPC Tag Data Standard, and these are enumerated below.18.1Conformance of RFID Tag DataThe data programmed on a Gen 2 RFID Tag may be in conformance with the EPC TagData Standard as specified below. Conformance may be assessed separately for thecontents of each memory bank.Each memory bank may be in an “uninitialized” state or an “initialized” state. Theuninitialized state indicates that the memory bank contains no data, and is typically onlyused between the time a tag is manufactured and the time it is first programmed for useby an application. The conformance requirements are given separately for each state,where applicable.18.1.1 Conformance of Reserved Memory Bank (Bank 00)The contents of the Reserved memory bank (Bank 00) of a Gen 2 tag is not subject toconformance to the EPC Tag Data Standard. The contents of the Reserved memory bankis specified in [UHFC1G2].18.1.2 Conformance of EPC Memory Bank (Bank 01)The contents of the EPC memory bank (Bank 01) of a Gen 2 tag is subject toconformance to the EPC Tag Data Standard as follows.The contents of the EPC memory bank conforms to the EPC Tag Data Standard in theuninitialized state if all of the following are true: Bit 17 h SHALL be set to zero. Bits 18 h through 1F h (inclusive), the attribute bits, SHALL be set to zero.Copyright ©2005- 2011 GS1 AISBL, All Rights Reserved. Page 128 of 218