Structured Modeling Schema for the DOS_Glossary Model

&&&&&&&&&&&&&&&&&&&&&&& Schema for DOS_GLOSSARY 
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&DOS_GLOSSARY

     &FILES FILE definition

          FILE /pe/ A FILE is a collection of related informaton. 
          All programs text and data on disk reside in FILES.

          F_NAME ( FILE ) /ce/ Every FILE has a FILE NAME that 
          follow DOS conventions.

          F_EXT ( FILE ) /ce/ Every FILE has a FILE EXTENSION that 
          follow DOS conventions.

          F_ID ( F_NAME F_EXT ) /ce/ The FILE ID of a FILE refers to
          its FILE NAME followed by its FILE EXTENSION, separated by
          a period.

          F_SIZE ( FILE ) /ce/ Every FILE has a FILE SIZE measured 
          in bytes.

          F_DATE ( FILE ) /ce/ Every FILE has a FILE DATE indicating
          the date and time on creation or last modification.

     &DIRECTORIES DIRECTORY definitions

          DIR ( FILE ) /ce/ A disk DIRECTORY contains an entry for 
          each FILE on a disk. Each DIRECTORY may contain other 
          DIRECTORIES, which are referred to as " subdirectories ".

          D_NAME ( DIR ) /ce/ Every DIRECTORY has a DIRECTORY NAME 
          that follow DOS conventions.

          D_SIZE ( F_SIZE DIR ) /ce/ The sum of the FILE SIZES 
          of all FILES in a DIRECTORY is called the DIRECTORY SIZE.

          D_TREE ( D_NAME ) /ce/ The DIRECTORY TREE is a rooted 
          labeled tree whose links represent DIRECTORIES are 
          contained in which other DIRECTORIES; the nodes ( with the
          exception of the root ) are labeled by and one-to-one with
          the DIRECTORY NAMES.