JEITA CP-3451 Explication - 134 - completing the main deliberations by the end of 2001 and issuing the standard by the end of February, 2002. At the second meeting held on October 2, 2001, proposals were submitted by two member companies, followed by questions and answers. The third (October 24, 2001) and fourth (November 6, 2001) meetings were devoted to discussions on the two proposals. A new proposal was presented, incorporating the advantages of both proposals, at the fifth meeting on November 22, 2001, and this new proposal became the basis for detailed studies thereafter. Also at this meeting, the version number was resolved to be "Version 2.2", based on the nature of the revisions. At the sixth meeting (December 11, 2001), the level of DSC writer support (i.e. Mandatory, Recommended, Optional) was resolved for the newly added tags and existing tags that can be used for the primary objectives of this revision were reexamined. At the seventh meeting (December 26, 2001), details of the DSC Format WG Specification draft were reviewed and revised as appropriate. It was further resolved to document guidelines, entitled "Guidelines for Implementing Exif 2.2 Tag Information", applicable to the new and existing tags that were deliberated for this version. These guidelines are appended as Chapter 0 to this Explication. Finally, at the eighth meeting, held January 21, 2002, details of the specification organization and guidelines were confirmed and approved. 3.    Main Issues Arising in the Deliberations 3.1    Summary of the Discussions The image quality produced by a DSC and those of a printer are based on vendor dependent technologies that are not suitable as being specified in a standard. Therefore, the goal of this standardization effort was to enable improved print quality when print processing is applied to an image data after being processed by each vendor's DSC. Previously, under some conditions, the user's expectations were not always met. To this end, a policy was adopted of having the DSC provide as much capture information as possible as an aid to improving print quality. Of the initial proposals, one was to record tag information mainly for print image processing, while the other took the approach of recording DSC capture information and having the printer interpret it. It was resolved by the committee to use the latter approach as the basis of deliberations thereafter, since it has more general applicability, though incorporate useful elements of the former proposal as appropriate. 3.2    Tag Information   In general, there are limits to the precision of the capture information that can be measured by a DSC. As such, if the information defined were to have strict values, suitable information may not always be obtained. Therefore, the definitions in this standard were made somewhat general so that various DSC models will be able to record its capture conditions. 4.    Main Revisions The tag information added for this revision are listed in section4.1. Existing tags that have undergone significant revision are given in section 4.2. 4.1    Newly added tag information   a)     SubjectArea   b)     CustomRendered c)     ExposureMode d)     WhiteBalance e)     DigitalZoomRatio