2.2.2.1 Icon Image

The property data MUST be an icon image, at most 32,768 bytes long. The image MUST be in any image format that has a unique signature at the beginning, so that the receiver can detect the image format purely by inspecting the image. There are many file formats that meet this requirement, including GIF and JPEG. A responder supports this property MAY use any such format, and the mapper MAY<4> recognize any such formats it chooses. If the image is not in a format that the mapper recognizes, the mapper MUST use a default image that it has, in place of the one it received from the responder.