Defines the encoding rules which shall apply to the representation of IPI-IIF image data. The IPI-IIF data format is defined in ISO/IEC 12087-3, called "Image Interchange Facility (IIF)". It is Part 3 of the Image Processing and Interchange International Standard, defined in ISO/IEC 12087. The IPI-IIF facilitates the interchange of digital images. It consists of two major parts: (1) the IPI-IIF data format (IIF-DF) definition, whose syntax is described using ASN.1; (2) the IPI-IIF gateway definition, whose functionality is described by an application programmers interface.