Table 1
Data Accounting System (DAS) Files for Study Databases
| File Category | Purpose | Actions | File Characterization |
| Raw files (R-files) | Collection | Data entered, validated, and documented | Certified, locked after data collection, limited access, fields named to reflect data capture |
| Research ready files (RR-files) | Dissemination | Created from R-files with RR-programs, under investigator supervision | Long-term, secured but shared among analysts, controlled by investigators, fields named to reflect data content |
| Analytic files (A-files) | Analyses | Created from RR-files with A-programs | Temporary, task specific, controlled by data analysts, fields named at discretion of each analyst |
