[developers] MRS in PET SVN with selective packing

[Ben Waldron]

I meant to say that the Lisp-internal representation of an MRS

(defstruct (psoa (:include basemrs))
  index)

which inherits from

(defstruct (basemrs)
  top-h
  liszt
  h-cons
  a-cons
  vcs)

doesn't contain global 'cfrom'/'cto' slots.

The Lisp-internal RMRS's do:

(defstruct (rmrs (:include basemrs))
  rmrs-args
  in-groups
  bindings
  cfrom
  cto
  origin)

If you like, I can volunteer to (i) move the 'cfrom' and 'cto' slots 
from the 'rmrs' defstruct to the 'basemrs' defstruct and (ii) arrange 
for these slots to be set appropriately when the MRS is constructed and 
(iii) for the slots to propagate from the MRS to the RMRS inside the 
'mrs-to-rmrs' function.

The tchart reference was put there as a temporary hack. But I forgot to 
remove it...

- Ben

Ann Copestake wrote:
> the MRS dtd does include global CFROM and CTO and that's where the RMRS should 
> get the values from ... I don't understand why the tchart reference was there 
> - it should not have been, other than as a strictly temporary hack
>
> Ann
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