ISO/IEC 15444-11:2006 defines, in an extensible manner, syntaxes and methods for the protection against errors that may occur during the transmission of JPEG 2000 codestreams compliant with ISO/IEC 15444-1. In ISO/IEC 15444-11:2006, these are referred to as Wireless JPEG 2000, ""JPWL"", and applications using JPWL are referred to as a ""JPWL system"".JPWL specifies a set of tools consisting of additional data structures to JPEG 2000 codestreams and error protection techniques necessary for error correction and signaling. ISO/IEC 15444-11:2006 includes definitions of the semantics, and suggests how these may be used.