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From: Richard Stallman <rms@gnu.org>
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Subject: Re: make-field suggestion
Date: Wed, 01 Sep 2004 00:57:24 -0400
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    I would like to suggest the make-field interface for Emacs.  The Emacs
    version would look something like this, if defaulting to text properties
    is okay:

    (defun make-field (from to value &optional buffer)
      "Make a field with value VALUE over the range [FROM, TO) in BUFFER.
    BUFFER defaults to the current buffer."
      (with-current-buffer (or buffer (current-buffer))
	(put-text-property from to 'field value)))

We can certainly install something like this, once it is clear what is
best.  It depends, I suppose, on how someone would plan to use it.