This part of ISO 28560 specifies a data model and encoding rules for the use of radio frequencyidentification (RFID) tags for items appropriate for the needs of all types of libraries (including national,academic, public, corporate, special, and school libraries). The rules for encoding a subset of dataelements taken from the total set of data elements defined in ISO 28560-1 are based on ISO/IEC 15962,which uses an object identifier structure to identify data elements.This part of ISO 28560 defines the technical characteristics required to encode the data elements definedin ISO 28560-1 in accordance with ISO/IEC 15962. These subsets of data elements can be different ondifferent items in the same library. The encoding rules also enable the optional data to be organized onthe RFID tag in any sequence. In addition, the encoding rules provide for flexible encoding of variablelength and variable format data.This part of ISO 28560 provides essential standards-based information about RFID in libraries. A sourceof additional information about implementation issues is provided in Annex A.