EXIficient Web formats become efficient ... EXIficient is a set of open source implementations of the W3C Efficient Extensible Interchange (EXI) format specification (see projects on github.com/exificient) in various programming languages Java JavaScript C/C++ and for various Web formats like XML (and formats using XML syntax, e.g., SVG, RSS, MathML, GraphML, ...) HTML JSON (Java, JavaScript, C) C