GS1 EPC Tag Data Standard 1.6 - Indicod-Ecr

3159316031613162316331643165316631673168316931703171317231733174317531763177317831793180BitPosition inSegmentField15 – 0 User MemorySize31 –16 BlockPermaLockBlock SizeDescriptionNumber of 16-bit words in user memory.If non-zero, the size in words of each block that maybe block permalocked. That is, the block permalockfeature allows blocks of N*16 bits to be locked, whereN is the value of this field.If zero, then the XTID does not describe the block sizefor the BlockPermaLock feature. The tag may or maynot support block permalocking.This field SHALL be zero if the Optional CommandSupport Segment (Section 16.2.3) is present and itsBlockPermaLockSupported bit is zero.Table 46. XTID Block PermaLock and User Memory Information16.3Serialized Tag Identification (STID)This section specifies a URI form for the serialization encoded within an XTID, calledthe Serialized Tag Identifier (STID). The STID URI form may be used by businessapplications that use the serialized TID to uniquely identify the tag onto which an EPChas been programmed. The STID URI is intended to supplement, not replace, the EPCfor those applications that make use of RFID tag serialization in addition to the EPC thatuniquely identifies the physical object to which the tag is affixed; e.g., in an applicationthat uses the STID to help ensure a tag has not been counterfeited.16.3.1 STID URI GrammarThe syntax of the STID URI is specified by the following grammar:STID-URI ::= "urn:epc:stid:" 2*( "x" HexComponent "." ) "x"HexComponentwhere the first and second HexComponents SHALL consist of exactly threeUpperHexChars and the third HexComponent SHALL consist of 12, 16, 20, 24, 28,32, or 36 UpperHexChars.The first HexComponent is the value of the Tag Mask Designer ID (MDID) asspecified in Sections 16.1 and 16.2. The second HexComponent is the value of the TagModel Number as specified in Sections 16.1 and 16.2. The third HexComponent is thevalue of the XTID serial number as specified in Sections 16.2 and 16.2.2. The number ofUpperHexChars in the third HexComponent is equal to the number of bits in theXTID serial number divided by four.Copyright ©2005- 2011 GS1 AISBL, All Rights Reserved. Page 125 of 218