Context: Despite these detailed standard definitions, cameras typically do not clearly indicate whether the user "ISO" setting refers to the noise-based speed, saturation-based speed, or the specified output sensitivity, or even some made-up number for marketing purposes. Because the 1998 version of ISO 12232 did not permit measurement of camera output that had lossy compression, it was not possible to correctly apply any of those measurements to cameras that did not produce sRGB files in an uncompressed format such as TIFF. Following the publication of CIPA DC-004 in 2006, Japanese manufacturers of digital still cameras are required to specify whether a sensitivity rating is REI or SOS.[citation needed]

Question: What measures might the user "ISO" setting correspond to?
Answer: the noise-based speed, saturation-based speed, or the specified output sensitivity, or even some made-up number for marketing purposes

Question: What did the 1998 version of ISO 12232 not permit?
Answer: measurement of camera output that had lossy compression

Question: What types of sensitivity ratings can be specified by a camera?
Answer: REI or SOS

Question: What standards changed what Japanese camera makers have to specify?
Answer: CIPA DC-004

Question: In what year was CIPA DC-004 introduced?
Answer: 2006

Question: Cameras must indicate when the ISO setting refers to what?
Answer: Unanswerable

Question: The 1998 ISO 12232 allowed for what type of compression?
Answer: Unanswerable

Question: What publication affected Japanese digital still cameras in 1998?
Answer: Unanswerable

Question: When was the TIFF file created?
Answer: Unanswerable

Question: The ISO 12232 requires manufacturures to specify what about a sensitivity rating?
Answer: Unanswerable