Parties creating Digital Library resources adopt and reinvent preexisting image file formats and format management techniques to satisfy Digital Library system requirements. While it will take some time for JPEG 2000-based Digital Library practices to gain prominence, the result will partially supplant and exist in parallel with TIFF-based practices. Initial efforts at outlining a JPEG 2000 practice indicate that significant differences in image quality, post-processing, file management and network resource requirements may exist.Our studies have indicated that not only must methods for determining digitizing device performance characteristics and image capture specifications based on TIFF practice must be revisited, clarified, and verified empirically; but that the concepts, terminology, and assumptions used to discuss or compare the two forms of practice must also be brought up to date; and that the specifications and techniques that constitute a JPEG 2000 practice are best developed by a multidisciplinary, mission-focused team of specialists from all Digital Library-relevant fields.