ACL then prompts the auditor to define the file’s structure in terms of the length of each field and the data type contained in each field (i.e., numeric, character, or date). When the data definition is completed, it is saved under a unique name assigned by the auditor. All future file access is accomplished by simply selecting the data definition from an ACL menu. ACL automatically locates the file and presents it on screen, where the auditor can review and manipulate its contents. Figure 10.8 shows a sample ACL data definition screen.