JEITA  CP-3451 - 53 - Count =    1 Default =    none 0 =    Measurement without differential correction 1 =    Differential correction applied Other =    reserved NoteWhen the tag Type is ASCII, it shall be terminated with NULL. It shall be noted carefully that since the value count includes the terminator NULL, the total count is the number of data+1. For example, GPSLatitudeRef cannot have any values other than Type ASCII 'N' or 'S'; but because the terminator NULL is added, the value of N is 2. 4.6.7 Interoperability IFD Attribute Information The  attached  information(field  name,  code)  stored  in  Interoperability  IFD  is  listed  in    and  the  meaning  will  be explained also. Table 13    Interoperability IFD Attribute Information Tag ID Tag Name Field Name Dec Hex Type Count A. Attached Information Related to Interoperability Interoperability Identification    InteroperabilityIndex 1 1 ASCII Any A.    Tags Relating to Interoperability The rules for Exif image files defines the description of the following tag. Other tags stored in Interoperability IFD may be defined dependently to each Interoperability rule. InteroperabilityIndex Indicates  the  identification  of  the  Interoperability  rule.  The  following  rules  are  defined.  Four  bytes  used including the termination code (NULL). Tag   =       1    (1.H) Type   =       ASCII Count   = Any Default =      none "R98" = Indicates a file conforming to R98 file specification of Recommended Exif Interoperability Rules   (ExifR98) or to DCF basic file stipulated by Design Rule for Camera File System. "THM"      = Indicates a file conforming to DCF thumbnail file stipulated by Design rule for Camera File System.