Data content standards mainly specify the representation of data in tags, readers to hosts (that is, middleware or applications). Because of the limitations of tag capabilities (storage capabilities, communication capabilities), the data representation at each link must take full account of their respective characteristics and take different forms of expression. In addition, host access to tags can be independent of readers and air interface protocols, which means that readers and air interface protocols are transparent to applications. The application interface of the RFID data protocol is based on ASN.1, which provides a set of commands that are independent of the application program, operating system and programming language and independent of the tag reader and tag driver.
ISO/IEC 15961 stipulates the interface between the reader and the application , which focuses on the standard way of exchanging data between the application command and the data protocol processor, so that the application can read and write the electronic tag data. Modify, delete, and other operating functions. The protocol also defines error response messages.
ISO/IEC 15962 specifies data encoding, compression, and logical memory mapping formats , together with how to convert data from electronic tags into meaningful applications. The agreement provides a set of data compression mechanisms that can fully utilize the limited data storage space in electronic tags plus airborne communications capabilities.
ISO/IEC 24753 Extension The ISO/IEC 15962 data processing capability  is applicable to electronic tags with auxiliary power and sensor functions. With the addition of sensors, the amount of data stored in the electronic tags, together with the management tasks for the sensors, has greatly increased. ISO/IEC 24753 specifies battery state monitoring, sensor setup and reset, and sensor processing. Figure 1 shows that ISO/IEC 24753, together with ISO/IEC 15962, regulate data processing and command interactions with auxiliary power and sensor-enabled electronic tags. Their role is to make ISO/IEC 15961 independent of electronic tags and air interface protocols.
ISO/IEC 15963 specifies the coding standard for the unique identification of electronic labels , which is compatible with ISO/IEC 7816-6, ISO/TS 14816, EAN.UCC standard coding systems, INCITS 256 plus reservations for future expansion. Note the difference with the item code. The item code is the code of the item attached to the tag, and the standard identifies the tag itself.
The real-time positioning system can improve the transparency of the supply chain, fleet management, logistics and fleet safety. RFID tags can solve short-distance, especially indoor object positioning, and can make up for GPS and other positioning systems can only be applied to a wide range of outdoor deficiencies. GPS positioning, mobile phone positioning, together with RFID short-range positioning means and wireless communication means can achieve full tracking and monitoring of item positions. The standards being worked out are:
The ISO/IEC 24730-1 application programming interface API, which specifies the RTLS service function plus the access method, aims to allow the application program to easily access the RTLS system. It is independent of the low-layer air interface protocol of RTLS.
ISO/IEC 24730-2 applies to the RTLS air interface protocol at 2450 MHz. It regulates a network location system that uses radio-frequency (RTLS) transmitters to transmit radio beacons and receivers to solve locations based on several received beacon signals. Many parameters of the transmitter can be configured remotely and in real time.
ISO/IEC 24730-3 applies to the 433MH RTLS air interface protocol. Content is similar to Part 2.
In 2006, ISO/IEC began to pay attention to the standardization of RFID application systems, and adjusted ISO/IEC 24752 into 6 parts and renamed ISO/IEC 24791. The purpose of this standard is to provide a framework for RFID application systems, and to standardize data security and a variety of interfaces to facilitate the sharing of information between RFID systems; so that applications no longer care about the differences between multiple devices and different types of devices. It facilitates the design and development of application programs. It can support distributed coordination control and centralized management of devices and optimize the performance of dense readers. The main purpose of this standard is to solve the problem of sharing data between readers and between application programs. With the wide application of RFID technology, the sharing of RFID data information is increasingly important.