The W3C has announced official support for the Efficient XML Interchange (EXI) standard, which emphasises the importance of efficiency in communication especially for high-risk environments.

EXI is already being adopted in Smart Energy Standards to support rapid communication between networks of smart meters, smart appliances and electric vehicles. EXI accelerates financial trading systems that depend on transaction speed. EXI speeds up defense applications, where rapid information flow can help save lives. EXI can make XML a more valuable data format for Web applications on mobile devices, where reduced utilization of the network and processor improves performance and extends battery life. And EXI can be used from JavaScript in desktop Web browsers for a faster user experience.