Data entry templates for fortran-type data cards

[Tom Smith]

I've got an application that takes data entry as
fortran-type data cards. Each data entry field must be
between the columns locations specified. The form
allows a comment field if the line starts with "C ".
I'd like to use the comment card as a template for the
next line. Consider these three lines in a data file:

C 345678901234567890123456789012345678901234567890
C  name1] name2] float1] float2] int]blank]*  int2]  
  MYNAME1MYNAME2     1.0    1.E6   99      1      3

I'd like emacs to use the comment line with the
brackets as a template for the next line. The "]"
would act as a field marker. On the data line, each
entry would act like a spreadsheet cell. Entering data
in the active cell would not shift the other cells.
Arrow keys could change the active cell. After leaving
a cell, numeric entries could be right justified. On
lines that don't have a "field-indicating" comment
line preceeding it, text entry and editing operates
normally.

Are their any elisp packages that do such a task? Or,
what elisp packages could I delve into that offer
somewhat similar functionality?

Tom

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