	Requirements for ascii file class (is-a processor file; abstract)


1) Store ASCII file descriptors in an extensible format.

2) Open an ASCII file with a given mode (read or write).  If successful, disallow further attempts to open.  If not
   successful, write an appropriate entry to the diagnostics file.

3) Close the ASCII file.  If not successful, write an appropriate entry to the diagnostics file.



	Requirements for ascii read file class (is-an ascii file; abstract)


1) Open an ASCII file in read mode.

2) Retrieve the next line in the ASCII file.  If not successful, write an appropriate entry to the diagnostics file.



	Requirements for ascii write file class (is-an ascii file; abstract)


1) Open an ASCII file in write mode.

2) Write a given line to the ASCII file.  If not successful, write an appropriate entry to the diagnostics file.



	Requirements for processor file class (abstract)


1) Store file data, including PCF file logical, in an extensible format.

2) Initialize the file data with the stored PCF file logical, or with a given PCF file logical.  If succesful, disallow
   further attempts to initialize.  If not successful, write an appropriate entry to the diagnostics file.

3) Retrieve the file data.
