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Section 3 - 8 SENTRY User’s Guide
Fitzgerald & Long
Punct for File Indexing - SENTRY builds B-trees to provide rapid cross referencing into the file
system. For example, let’s imagine that you are looking for a file called “payroll.something”. You can’t
remember the “something”. In the File System screen you may enter “payroll” and SENTRY will search
the B-trees for all references to “payroll”. A list of pathnames to all files and directories whose name
contains the string “payroll” will be displayed. The cross referencing on the word “payroll” is dependent
upon the characters defined in this field. Special characters such as “.” and “-” or “_” are used in file or
directory names to make a compound name more readable. SENTRY’s B-trees will use the set of
characters defined here to break out the components of a compound name such as “payroll.ledger”. This
file would be indexed on the word “payroll” and on the word “ledger”. Care such be taken in selecting
these characters for cross referencing so that they are limited to those which are commonly used. The size
of the B-trees increases significantly as the number of characters in this list increases.