The frames pipeline (frames) detects, deblends, and measures objects, carrying out this processing on a field-by-field basis. This section describes what one needs to know to interpret the quantities we calculate in frames, rather than the technical details, which will be covered in lupton01b. These quantities are stored in the PhotoObj and Profile classes (Table 6). Mask bits set in objFlags of PhotoObj are for the object detections for all bands combined. Mask bits set in flags of PhotoObj are for the detection in each band. The mask bit values are given in Table 9. We refer to these classes and masks throughout this section. Further products of the imaging pipelines are given in § 2.2.